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The following is posted for the convenience of the membership.  Any errors or omissions in this page do not take precedence over the official copies of the codes and plans maintained by the ISCA.

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ISCA CONSTITUTION

Article I -- Name

Interlake Sailing Class Association, a corporation organized not for profit in the State of Ohio.

Article II -- Purpose 

The objectives of this Association are the promotion and perpetuation of the Interlake class yacht and the enhancement of the full enjoyment of the sport of sailing.  A further objective is the promotion of good sportsmanship and fellowship among the members of the Association.

This Constitution is the sole reference wherein the rights, duties, obligations and privileges of the Association members are defined.  It is further intended as a guide to the policies and operation of the Association.

Article III -- Insignia

The emblem of the Class shall be a silhouette of a Marconi jib and mainsail in a color contrasting with the background.  The proportions, dimensions, and location (on sail) are shown in the Specifications.

Article IV -- Organization 

1. The Association shall consist of individuals who shall join as members, if eligible.

2. Individual members shall join a Fleet if possible.  The Fleet, a territorial branch or unit consisting of a minimum of three Active Members, shall elect its own officers which must include a Fleet Captain, and shall be self governing in local matters not conflicting with Association rules.

3. Groups of Fleets in the same geographical area may be organized into Regions by the Executive Committee.

4. The powers of the Association shall be vested in the Executive Committee, except as otherwise noted.

Article V -- Membership and Voting

The membership of the Association shall consist of three classes:  Active, Associate, and Honorary.

1. An Active Member must be an owner or part owner (not less than 25 percent) of an Interlake, or a representative of an Interlake Fleet organized within any branch of the armed forces, or in the case of club owned Interlakes a member of such club designated by the club, regardless of age or sex.  An Active Member is privileged to hold office, to vote, and to skipper an Interlake in sanctioned events in accordance with the Bylaws.

2. An Associate Member must be a non-owner of an Interlake.  An Associate Member cannot vote or hold office or skipper in sanctioned events.

3. An Honorary Membership may be granted by a majority vote of the Executive Committee to a person who has made an outstanding contribution to the Association or the sport of sailing.  Honorary Membership is exempt from dues payment.

Article VI -- Officers & Executive Committee 

The President, Vice-President and Secretary-Treasurer shall be elected at the Annual Meeting and all Officers normally shall serve through the next Annual Meeting and the National Championship Series and until their successors qualify.

At least forty days prior to each Annual Meeting, the Nominating Committee shall name one candidate for each of these offices.  The names of the candidates and the offices to which they are nominated shall be filed with the Secretary who shall notify the membership of the Association of such nominations at least thirty (30) days prior to each Annual Meeting by mailing the same to all Active Members.

Any Active Member of the Association may be nominated as a candidate for any of the offices to be filled at the Annual Meeting by a petition signed by not less than ten (10) Active Members.

All petitions shall be filed with the Secretary at least twenty (20) days prior to each Annual Meeting and he shall notify the membership of the Association thereof at least fifteen (15) days prior to each Annual Meeting in the manner provided for in this Article.

Each Active Member may cast a vote for each office to be filled or may grant his proxy, pledged or unpledged, to any other Active Member on a form prescribed by the Executive Committee.  The candidate receiving the greatest number of votes shall be considered elected.

1. President:  Chief executive, presides at meetings, Chairman of Executive Committee.  Rules on procedure, jurisdiction, summarizes decisions, appoints special committees, fills vacancies by appointments pending Executive Committee action, and authorizes payment of all bills.  Performs other duties customarily delegated to the chief executive of such organizations.

2. Vice-President:  Acts in the absence of the President, is Chairman of the National Race Committee, and coordinates the activities of the regional Vice-Presidents.

3. Secretary-Treasurer:  Handles system of records, minutes, forms and reports.  Keeps records of Fleets, issues Fleet numbers, and issues hull numbers.  Collects, deposits and keeps records of fees, dues and other receipts of the Association.  Pays bills and other obligations incurred by the Association when authorized by the President or Executive Committee and performs other duties normally allocated to the office.

4. Intercom Editor:  Edits, compiles and publishes the Intercom which is the newsletter of the Interlake Sailing Class Association.  Shall be appointed by the President.

5. Regional Vice-Presidents:  Promote the Class Association and encourage new owners.  Encourage all Interlake owners to join ISCA.  Promote regional fleets and expansion fleets.

6. Executive Committee:  This governing body of the Association shall consist of the above officers and the immediate Past President, Chief Measurer, and the leader of the Marketing Committee.

A quorum for a meeting of the Executive Committee shall consist of fifty percent of this Committee to be present at a meeting, or represented by a signed proxy.  Unless otherwise noted, a simple majority shall decide questions put to a vote.  This Committee interprets the Constitution and Bylaws and determines operating policy of the Association.  It is the last “court of appeal” in disputes concerning Constitutional rights.
In addition, it shall:

a. when necessary, enforce its decisions by suspension or expulsion of an offending Member or Fleet.  This action requires a two-thirds majority affirmative vote by the entire Executive Committee.

b. grant Fleet Charters.

c. sanction or ban races.

d. permanently fill vacancies on the Executive Committee as they occur.

Article VII -- Committees 

The Executive Committee shall appoint the following working committees within thirty days of their election and fill vacancies promptly as they occur.

1. Measurement Committee:  The chairman becomes the Chief Measurer of the Association and is in charge of all measurers, but no professional boat builder or sail or hardware maker is eligible for this position.  He shall grant or reject all measurement certificates and issue duplicates, and answer questions about measurement rules.  He shall interpret the rules and regulations concerning construction, sail plans, rigging and equipment and shall make rulings on matters not specifically covered in the Official Plans and Specifications.  Such rulings shall be subjectto the approval of the Executive Committee and all members have a right to appeal the Chief Measurer’s decisions.  Rulings shall be published in the first issue of the Intercom following such approval.

2. Nominating Committee:  Shall consist of five Active Members, never the President, Vice-President, or Secretary-Treasurer, and chaired by the Immediate Past President when possible.

3. Marketing Committee:  Consisting of a minimum of three members, this committee is responsible for the efforts to market, promote, and publicize the Interlake including (but not limited to): advertising; submission of articles or press releases to various publications; preparation and distribution of promotional materials such as brochures, videos, or displays; and assisting builders in their marketing efforts.  The leader of this committee is a member of the Executive Committee.

4. National Race Committee:  Under the chairmanship of the Association Vice-President, this committee shall consist of a minimum of five members.  It shall conduct the Interlake Class National Championship Series and it shall function for 48 hours after the last race of the Series.  All protests and other business shall be disposed of before disbanding.  No races other than the National Championship Series shall come under its jurisdiction.  The series must be in accordance with the section outlining the procedure for conducting the National Championship Regatta.

Article VIII -- Meetings 

1. The Annual Meeting of the Association shall be held in conjunction with, and in the vicinity of, the National Championship Series.  Special Meetings of the Association may be held at the order of the Executive Committee  All items to be considered at the Annual or Special Meeting must be distributed to the Active Members by the Secretary at least thirty days prior to the date of the meeting, in a form that permits voting by proxy.  Requests for items to be placed on the agenda of the Annual or Special Meeting must be in the hands of the President at least 40 days in advance of the meeting.  The Executive Committee has the final decision on the date, location and agenda for the meeting concerned.  Only items on the published agenda can be voted on at the meeting.  New business can be presented and discussed, but not voted on at the meeting.  A quorum for Annual and Special Meetings shall consist of one-sixth of the Active Membership to be present or represented by proxy.  There shall be a maximum limit of one hour for discussion of each subject or question on the agenda.  A maximum of twelve minutes will be allowed an Active Member to discuss any one subject.

2. Executive Committee Meetings may be called at a time and place determined by the President or any other four members of the Executive Committee.  Notice of such meetings shall be mailed to each Committee Member at least seven days before the date of each Executive Committee Meeting.

3. Robert’s Rules of Order shall govern the conduct of all meetings.

4. Telephone Conference. Any member of the Executive Committee may participate in a meeting of the Executive Committee by means of conference telephone or similar communications equipment allowing all persons participating in the meeting to hear each other at the same time.  Participation by such means constitutes presence in person at a meeting.

5. Electronic Mail. The Executive Committee may conduct business by electronic mail provided that all communications by any members are copied to all other members of the Executive Committee, and that any decisions made using this method shall be made by the affirmative vote of at least two thirds of the entire voting membership of the Executive Committee.  Decisions made using this method shall be incorporated in the minutes of the next meeting of the Executive Committee.

Article IX -- Amendments 

1. The Constitution, Bylaws and Specifications cannot be suspended, but may be amended, at a meeting or by mail vote by a two-thirds majority.

2. A copy of the proposed amendment signed by the proposers, who shall be not less than 25 active members or a majority of the Executive Committee, shall be delivered to the Association Secretary at least forty (40) days prior to the date of the meeting at which it is to be considered.  All proposed amendments at either Annual or Special meetings must be included in the “Notice of the Meeting” which shall be mailed to all active members not less than 30 days prior to the date of the meeting.

3. No amendment shall be passed that would render ineligible a yacht, not including its hardware or rigging, or Active Member whose eligibility was established under existing rules and whose status cannot be changed to conform to the new rules.

4. The Executive Committee shall have the power to clarify, simplify, or correct the wording of any article without changing the intent, purpose, or spirit of the article in question.

Article X -- Voting 

1. A vote may be cast in person or a signed proxy representing that vote may be granted, pledged, or unpledged, to any other Active Member.

2. The Executive Committee may elect to submit a question to mail vote of the Active Membership and a minimum of thirty days shall be allowed for the return of ballots.

3. A majority of votes present shall decide all questions except as may be otherwise provided.

ISCA BYLAWS

Article I - Dues 

1. Association dues must be paid before one becomes an Active or Associate Member.

2. Active Members shall pay $30.00 dues annually to the Association, effective with the 1998 membership year.

3. Associate Members shall pay $12.00 dues annually to the Association, effective with the 1998 membership year.

4. Dues are payable by March 15.  A membership whose dues are not paid by this time shall be considered terminated.  New members joining the Association between August and January shall receive the rights and privileges of membership for that fall and also the next year.

Article II - Renewal of Charter 

1. Each fleet is required to file an annual report with the Association Secretary by January.  The report shall consist of a list of the fleet officers, racing results, and membership roster. 

Article III - Reports 

1. Each fleet will keep fleet and membership rosters current with Association Secretary.

2. Fleet news, such as race results, new owners, classifieds, etc., will be sent to the Association Secretary and the Intercom Editor.

Article IV - Measurements and Certificates 

1. The owner of a yacht to be measured must pay a measurer's fee established by the Executive Committee whether a certificate is approved or not.  The Measurer must have disinterested supervision when measuring his own yacht.

2. To protest a yacht's compliance to the Specifications and Bylaws, the protestor must include a $5.00 deposit, returnable only if sustained.

3. Fleets shall be responsible for enforcement of Association rules to govern sails, spars, hulls, and equipment in local races.

4. Each mainsail, jib and spinnaker purchased after October 1, 1976 must have a sail royalty label permanently affixed.  The royalty is $5.00 for each sail.  Labels may be purchased from the Secretary-Treasurer.

Article V - Racing Rules 

The rules of the International Yacht Racing Union, as adopted by the United States Sailing Association shall govern all Interlake Sailing Class Association races held by the Association or fleet unless otherwise specified in the Notice of Race or when they may conflict with the rules of the Interlake Sailing Class Association, in which event the latter shall supersede.

Article VI - Sailing Instructions

1. The number of persons in one boat in a race shall be at least two and not more than three.  Individual clubs may deviate from this requirement in club events open to club members only.  In a National Championship Series or other sanctioned event, the crew for each race shall be named prior to the close of registration.  The crew named must be carried either in the designated races or throughout all races of the event, the only exception being in the event of illness or other unforeseen circumstances, in which case the managing Race Committee's written approval of a substitution(s) must be obtained prior to the race(s) in which the substitute is to be entered.

2. Only an Active Member, or their spouse, or their minor children may skipper in a sanctioned event.

3. Race position points shall be awarded to the eligible skipper, and not the boat.  A skipper must sail the same boat in all races of a series unless given permission to do otherwise by the Race Committee.

4. An Interlake must carry anchor and line, PFD for each person in the boat, bailing bucket, paddle and throwable device in all sanctioned events.  Such items must be acceptable to the supervising Race Committee.

5. In a sanctioned event, the person entering the boat shall handle the helm of the yacht through all races of the event except in an emergency, or during temporary adjustment of rigging or equipment, or while flying a spinnaker.

Article VII - Interpretation 

In deciding any question, the intended meaning of the rule shall be considered rather than the technical misconstruction that might be derived from the wording.  Extenuating circumstances cannot be taken into consideration insofar as a racing rule is concerned, if there was an actual foul, but may be taken into consideration in class rules or instructions if the wording requires interpretations and no deliberate attempt to gain an unfair advantage had been practiced.  Precedent and the established policy of the Association shall be taken into consideration in interpreting any rule or regulation of obscure meaning or not covered at all.  The rules of the Executive Committee, the National Race Committee, and the Measurement Committee shall be carefully preserved for reference.

Article VIII - Sanctioned Events 

The Interlake National Championship Series, and district eliminations for Nationals if required, are Association sanctioned events.  Any club or fleet may request Association sanction for Interlake Class events.  If granted, the same rules and regulations as the National Championship Series will apply.

Article IX - Obligations 

The Association shall not be liable for any debts contracted by its Fleets or Officers other than expenditures authorized by the budget or upon written order of the President and Secretary.

INTERLAKE SPECIFICATIONS

Article I - Requirement 

1. To be able to carry the name of Interlake, a yacht, its spars, sails, and rigging must conform throughout with respect to the design, dimensions, and materials of the official plans and specifications of the Interlake Sailing Class Association.

2. In the event of a revision to the official plans that would affect equipment of a yacht, the affected equipment is eligible until replacement is necessary and then it must be in accordance with the revisions.

3. The yacht number must be permanently cut or burned into the keel of wooden hulls or drilled into the centerboard well of the glass-plastic hulls.  These numbers shall be at least three inches high for identification at the time a certificate is issued.

4. Weight:  A yacht, its spars, rigging, rudder and tiller shall weigh at least six hundred and fifty pounds.  Yachts, as described, weighing less than the class minimum weight shall be corrected by adding sufficient weight.  This weight may be any metal, but must be of block or ingot shape, fastened by screws or bolts.  If steel or iron is used, it must be painted to prevent rust or corrosion.  If the amount of weight added is fifteen pounds or less, it may be attached to the centerboard trunk.  If the amount is greater than fifteen pounds, half of the excess must be attached aft of station 16 and the other half of the excess forward of station 2.  All corrector weights must be labeled as to their weight and have their weight and location listed on the yacht's measurement form.

5. Options:  Nothing is optional in these specifications unless the word “optional” appears in the article or on the plans and then only within the limitations described.

6. Use of substitutes is always at the user's risk.

7. After the boat leaves a licensed builder, continuous conformance of all specifications is the responsibility of the owner.

8. The purpose of the restrictions under which Interlake boats and sails are approved is to insure that, to as great a degree as possible, all boats and sails have identical racing capability.  It is impossible to list every single variation that might turn up in the future, and it is impossible to make any set of restrictions in which, at some future date, someone cannot find what appears to be legal means of obtaining some racing advantage.  Any boat or sail having features which are not consistent with this purpose will not be approved and cannot race even though there is no specific restriction preventing the item in question.  Improvements and changes will be made only when these changes do not obsolete older boats from the standpoint of racing capability or when they can be accomplished by anyone at reasonable expense.

Article II - Hull Dimensions

1. Length Overall:  18' 0"

2. Beam at Deck:  6' 1½"

3. Beam at Chine:  5' 2½"

4. For halfbreadth measurements, see Table 1 and the Official Plans.

5. All hulls must come from a mold approved by the Chief Measurer or must be measured by the Chief Measurer or a measurer approved by both the Executive Committee and the Chief Measurer.  Upon acceptance, a measurement certificate may be issued by the Association.  If at any time the boat or mold is found to be outside either the word or spirit of the rules, the acceptance and measurement certificate may be withdrawn or suspended for a suitable period of time.  Final authority on all such matters will rest with the Executive Committee.

Article III - Hulls and Decks

Any construction technique or material not in the Official Plans, or hardware whose purpose is to concentrate weight in the center of the boat or avoid corrector weights in excess of fifteen pounds is illegal.  Hulls and decks must be constructed of uniform thickness and density.  To keep the class growing and current with good boat construction methods, the following are acceptable methods of constructing hulls and decks:

1. Wooden hulls and decks:  To insure class lines and weight, the plans are a guide for sound boat construction with respect to strength and boat life.

2. Reinforced Plastic Hulls:  The Interlake may be molded of reinforced plastic with or without “sandwich fillers” laminated between plies for stiffness.  If molded without filler for “sandwich” construction, the thickness of hull and deck sections must be of sufficient cross-section to produce the same general rigidity of structure as a wooden boat.  In addition, if not of “sandwich” construction suitable ribs, stringers, webs, etc. must be employed to prevent excessive oil canning of hull surfaces.

3. All points of stress must be additionally reinforced by extra materials to produce a hull of comparable strength and durability to the wooden model.  Because of the constantly expanding variety of reinforcing materials, resins, sandwich fillers and production techniques, prospective builders or existing builders are required to present in detail their proposed construction methods and material and to secure approval of the Executive Committee, through the Measurement Committee, prior to any production of Interlake Class yachts.

4. It is the intention of the Interlake Sailing Class Association to maintain the extraordinary standard of quality of the boat and any deviation from the spirit of this by any builder may result in revocation of the issuance of measurement certificates and boat numbers.

5. The same principle applies to fastenings, fittings, hardware, and rigging.

6. Prior Review and Inspection:  Before replacing or modifying a hull, deck, centerboard trunk, rudder, or floorboards, an owner is strongly encouraged to contact the Chief Measurer for review of the proposed modifications.  The Chief Measurer shall review the proposed modification and the Chief Measurer or someone they designate shall inspect the completed job.

7. Deck and Cockpit Options:  Cockpit coaming, and splashboards are optional.

8. Cockpit Flooring:  Permanent cockpit floorboards may be constructed of ½" plywood maximum.  Permanent floorboard frames may be ¾" wide if of hardwood or 1½ inches maximum if softwood.  Spacing is optional, but must be uniform throughout.  16" OC (On Center) is recommended.  Permanent floorboards must cover the entire width of the cockpit to within 1.5" of the sides, and have a minimum length of 95".  Removable floorboards and their supports may be of any construction, but must be removed prior to weighing the boat.

9. Deck Requirements:  A deck must either be a fiberglass deck from an approved mold or meet the following requirements.   Modified fiberglass decks must meet the following requirements except for 9 a. Material and 9 c. Crown.

9a. Material:  Wood with a minimum density of 22 lb./ft3 and a minimum thickness of 3/8" or plywood with a minimum thickness of 5/16".  Fiberglass decks must be ½" minimum end grain balsa, balsa plank, or klegecell.  Verticelä and similar honeycomb materials are prohibited.  Carbon fiber, Kevlarä, E-Glass, and similar ‘exotic’ materials are prohibited except in very limited areas requiring special reinforcement.  Further recommendations include all joints to be secured with epoxy, all exposed wood to be sealed with epoxy, and ultraviolet inhibitor applied to all areas exposed to sunlight.  The upper part of the deck exposed to sunlight must be covered with fiberglass cloth and epoxy to prevent weather damage.

9b. Deck Frames, Beams and Stringers:

1. Athwartships deck frames ¾" thick and 2" wide if curved to follow deck curvature or 1 ½" wide at the shear if trimmed to follow the deck crown as shown in the diagram.  A ½" x 1 ½" shear clamp strip is also recommended as shown in the diagram.

2. Longitudinal stringers approximately equally spaced with minimum dimensions of ¾" x ¾" and recommended dimensions of ¾" x 1 ½".  Four stringers are required if the frames are on 24" centers but only two stringers if the frames are on 12" centers.

3. Center deck beams from the stem to the centerboard trunk and from the aft edge of the cockpit to the transom ¾" x 3" or an alternate box section as shown in the diagram.

4. Side deck supports of 3/8" plywood minimum from the inboard edge of the deck to the chine and thence to the shear.  These supports are to be solid wood or plywood.

9c. Crown:  The crown of the deck must be 4.00 in a chord of 7' or a radius of 18' 6½" as shown in the diagram.  The deck crown measurement is made at the forward edge of the mast and the optional splashboards must be removed for the measurement.  The maximum error is 0.500".

9d. Cockpit:  The cockpit must be between Stations 7 and 16.   The side deck, including seats, must be 12.5" - 16.5" measured as follows:

1. Lay the deck crown template athwartships at any location.

2. Measure inboard six inches from the edge of the deck.  Over this region, the maximum deviation below the template is 0.500".

3. Measure inboard 12.5" from the edge of the deck.  A vertical line down from this point 12" must contact the deck as shown in the diagram.

4. Measure inboard 16.5" from the edge of the deck.  A vertical line down from this point 12" must not contact the deck as shown in the diagram.

9f. Mast Step:  The area under the mast step must be reinforced or suitably constructed to withstand the rig loads.  The loads must be supported by the top of the centerboard trunk or its forward extension.

9g. Rubrail: A wooden deck must be equipped with a wood, plastic, or aluminum rubrail with a cross-sectional diameter of 3/4" minimum.

10. Mast Step:  No mechanical device shall be allowed to change the foot of the mast; otherwise, optional to type and material.  May be mounted on deck.

11. Centerboards:  Any material may be used.  The thickness shall be between 0.187 and 0.250 inches.  The size and shape must conform to the official plans.  The centerboard pivot bolt must be located 2.5" ± 2.0" forward of station 8 on the official plans.  Any existing boat as of July 1, 1990, not conforming to the centerboard pivot bolt location is eligible under Article IX paragraph 3.  Any reconstruction of the hull by removing and replacing the centerboard trunk must then conform to the centerboard pivot bolt location that is stipulated above.

12. Rudder:  Outboard rudder of the size and shape as shown on plans.  May be pivoted, but must be all the way down during races.  Minimum weight for the complete rudder assembly, not including the tiller, is 8 lbs.  Rudder profile above the waterline is optional.  As of June 1, 1979, optional rudders (spade) will not be allowed.  Existing boats with optional rudders (spade) will be allowed, but must be registered with the Class Secretary by June 1, 1979.

13. Chain Plates:  The center of the chain plate hole shall be 8' 4" ± 1" aft of the bow excluding rubrail.

14. Hardware:  Optional except:

a. Any hiking aids other than straps or hand lines within the confines of the hull are not allowed.

b. No electronic devices designed for racing benefit are allowed on the boat, with the exception of a device or devices that do the following:

1. A device that displays the magnetic heading of the boat; or

2. A device that displays the time of day, elapsed time, or countdown time.

No other electronic devices on the boat shall be used to provide a racing benefit.

c. Mast steps which permit the mast to pivot are not allowed.

15a. Materials:  The trunk must be rigidly attached or molded to the hull in a fixed vertical position.  The sides of the trunk must be constructed of marine plywood 0.500 inches thick or material to provide equal or greater stiffness.

15b. Enclosure:  The trunk must either completely enclose the centerboard or the top edge of the trunk may be shortened to expose the centerboard if the trunk meets the requirements of Section 15c below.

15c. Reduced Centerboard Trunks:  The top edges of the centerboard trunk must extend past the upper corner of the board in all positions.  The top edges of the trunk must also be 14.5 inches minimum above the top of the keel.  The portion of the trunk enclosing the upper front corner must lie at least 21.25 inches from the centerboard pivot bolt.  Forward of the pivot bolt, the height must be at least 21.25 inches as shown in the diagram.  The trunk must be completely enclosed or a reinforcing flange extending at least 1.00 inches laterally and 0.25 inches minimum radii must be attached to the flat portion of the trunk as in the diagram.

16. Flotation: Minimum 13 cubic feet of any combination of: 1) solid unicellular foam, such as Styrofoam or equivalent, having a density of 4 pound per cubic foot maximum, and/or, 2) marine purpose airbags; all of which must be securely fastened into the hull.  Balsa wood enclosed in fiberglass-impregnated cloth is considered equivalent.  Supposedly airtight compartments are not considered equivalent.  All existing boats shall meet this specification by April 1, 1998.

Article IV - Spars and Rigging

1. Mast:  Exact size and shape as shown on plans.  Pear-shaped metal extrusion only.  Any change of the mast at the partners or step shall be prohibited during races.  Metal mast must be sealed or foamed ensuring flotation.  As of January 1, 1980, existing wood masts will be allowed until replacement is necessary.  Front of mast shall be 6' 8" aft of the stem.

2. Boom:  Exact size and shape as shown on plans.  Pear-shaped metal extrusion only.  The boom section shall not bend more than 1 ½" horizontally and 1 ¼" vertically when supported 6" from each end and loaded in the exact center with a weight of 75 lb.  The spars shall be maintained straight and any rigging made purposely to bend them shall not be allowed.

3. Standing Rigging:  At least 1/8" in diameter.  There shall be a forestay and two shrouds and any change in the set of them during a race shall be prohibited, except in the case of emergency.  The forestay shall be 8" aft of the stem at the deck and lead to a point on the mast that is 18' 0" above the deck.  The shrouds shall lead to points that are 18' 0" above the deck.

4. Jib and Main Halyards:  There shall be a jib halyard and a main halyard, which shall lead down the outside of the mast and shall not be used as stays.

5. Racing Bands:  Two ½" bands of contrasting color must be placed on the mast a distance of 21' 0" apart with the lower band 22" ± ½" above the deck at the upper edge of the lower band.  A ½" band of contrasting color must be placed on the boom a distance of 12' 3" from the after side of the mast to the inner edge of the band.  All parts of the mainsail, including the headboard, must be confined inside these bands during races.

6. Spinnaker Pole:  The spinnaker pole must be 7' - 8' 1" in length.

7. Whisker Pole:  Used to hold out the jib before the wind.  It must be 8' ± 1" in length.  One end of the pole must be securely affixed to the front of the mast while being raced.

Article V - Sails

1. Dimensions:  Maximum dimensions 
 

	Mainsail	Jib
Luff	21' 0"	16' 0"
Foot	12' 3"	7' 0"
Leech	23' 3"	14' 4"
Mid-Girth	7' 10"	4' 2½"
Headboard horizontal & vertical	6"	N/A
Foot Roach	N/A	9"

For Spinnaker, see the drawings

Foot roach shall be measured by establishing a line from the tack to the clew.  No part of the foot of the jib may be more than 9" beyond this line.

Official insignia to be located on the mainsail between the upper and intermediate batten.
Official number to be located on the mainsail between the intermediate and lower battens.
Official number (not insignia) to be placed on spinnaker also.  Number on spinnaker to be 10" high centered in the bottom two-thirds on both sides.

3. Sails are measured with the cloth pulled out to its normal size as set on the spars.  Except at the main headboard, the points of measurement at the corners of the sail shall be taken at the intersection of the extended lines of the extreme edges of the sail, including bolt ropes or tapes, but not including hoisting pennants, external cringles, etc.  All leeches to be measured with two pound pull.

4. Zippers:  Zippers are not allowed in mainsail or jib.

5. Spinnaker:  Maximum spinnaker dimensions are shown in the attached drawing.  Only one spinnaker is permitted on board on any one race.

6. Spinnaker Hoist:  The spinnaker may not hoist to more than 18' 6" above the deck.

7. Spinnaker Material:  The spinnaker shall be of woven material.

8. Correct Number:  The correct number, a minimum of 10" high, must be displayed on both sides of the mainsail and spinnaker.

9. Royalty:  Sail royalties shall be paid for all sails, and the royalty patch shall be permanently affixed to all Interlake sails.

Article VI - Table of Tolerances
 

	Hull	Under	Over
1.	Length Overall	1/2"	1/2"
2.	Half breadths at deck and chine stations 8 & 12	3/8"	3/8"
3.	Half breadths at deck and chine stations 4 & 18	1/4"	1/4"
4.	Frames, position from correct center	3/8"	3/8"
5.	Contour lengthwise and  athwartship at each station	3/8"	3/8"
6.	Freeboard	1/4"	1/4"

7. Warning:  Contour tolerances allow for sag in a true hull and boat should be built in sizes on plans.

8. Rudder:  Measured with a full size pattern, must not vary more than 1".

9. Other Hull Dimensions:  Other dimensions not covered above or shown as optional in the specifications, shall conform to the specifications shown below:
 

	Under	Over
If over 10'	1 %	1 %
If 5' to 10'	1½ %	1½ %
If under 5'	2 %	2 %

 

	Sails and Equipment	Under	Over
10.	Linear tolerances on sail dimensions	100%	none
11.	Batten lengths	100%	none
12.	Linear tolerances mast and  boom	5%	none
13.	Mast at deck	4"	4"
14.	Jibstay may be shifted fore or aft	2"	2"
15.	Sidestay (vertical measurement)	1/2"	1/2"
16.	Chain plates	1"	1"
17.	Centerboard length and width	1"	none

18. Position of Other Rigging:  Optional.

19. Items Not Covered:  Anything not covered herein shall be decided by the Association Measurement Committee, but be subject to appeal to the Executive Committee.

Article VII - Honor Awards

1. Chevrons may be displayed by the first three place skippers of the National Championship Series, the Regional Championship Series, and the local fleet champion.

a. First place will be awarded three chevrons.
b. Second places will be awarded two chevrons.
c. Third places shall be awarded one chevron.  

a. National Championship Series -- Gold.
b. One black chevron may be awarded to local fleet champion.
c. Indiana Region -- Red.
d. Michigan Region -- Green.
e. Northern Ohio Region -- Blue.
f. Southern Ohio Region -- Orange.

4. The chevrons and numerals, if displayed on the sails, shall be affixed to both sides of the mainsail as follows:

a. The apex of the chevrons is to be 6" from the leech, point up, and oriented to point along an imaginary line parallel to the leech.
b. The apex of the lowest chevron shall be 7' from the clew of the mainsail.

6. Additional receipts of the same award in subsequent years may be indicated by placing the two year digits 1" below those of the last award.

7. Numerals are to be the same color as the chevrons.

8. Honor awards are made to the skipper, not the yacht.

Article VIII - Notice to Builders

1. The Interlake Sailing Class Association owns all rights to the title, and interest in the original plans and reserves the right to refuse to issue a number or grant a measurement certificate to any yacht.

2. A manufacturer of Interlake sailboats must receive approval from the Interlake Sailing Class Association.

3. An individual building an Interlake must obtain a set of official plans and specifications from the Interlake Sailing Class Association.

4. Official class numbers are assigned to a completed boat when the measurement certificate is awarded.  Certification fee is set by the Interlake Sailing Class Association.  The Secretary-Treasurer will issue a five boat block of consecutive numbers to the builder.  Each block must be paid within 30 days.  A new block will not be issued while two blocks are unpaid.

Article IX – Advertising

The advertising status of the Interlake Sailing Class Association is Category C under the ISAF Advertising Code, subject to the additional limitations of this Article.

1. Non-Club Boats.  Except as provided in Section 2, only Category A advertising is allowed.

2. Club Boats.  Boats provided to an event through a non-profit organization, such as a sailing club, community sailing program, or school, may display hull advertising as allowed by the ISAF Advertising Code.  This advertising may not be forward of station 4.5 of the hull, which is reserved for advertising that may be chosen and required to be displayed by the event organizing authority.  In addition, the hull advertising may not be for alcohol or tobacco.  No advertising in excess of Category A limits is allowed on spars or sails.
 

INTERPRETATIONS OF THE CHIEF MEASURER

1.  Hull and Deck Dimensions     Adopted:  Prior to 10-Mar-91 

Measurement of boat dimensions are taken from the imaginary intersection of the hull and deck (where applicable).  Rub rails are specifically excluded. 

2.  Sail Measurement Points      Adopted:  Prior to 10-Mar-91 

 Revised:  January 1994 

For purposes of sail measurement, the tack, clew, and head are taken at the imaginary intersection of the sail edges.  For example, the head of the sail is found by extending the luff and the leech until the extensions cross, independent of the halyard attachment eye.  The extension lines can be thought of as infinite lines that touch the edge of the sail at two or more points.  The extension lines must enclose all ropes and tapes.   If multiple lines can be constructed, the lines shall be used which result in the shortest luff, leech, or foot measurement.

The only exceptions to this are noted in Interpretation 3 below.

3. Mainsail Measurement Points      Adopted:  Prior to 10-Mar-91 

For purposes of measuring the luff of the mainsail, the two edges extended to determine the head are the top of the headboard and the luff.  For purposes of measuring the leech of the mainsail and determining the mid girth point, the two edges extended to determine the head are the top of the headboard and the leech.

4.  Allowable Equipment When Weighed      Adopted:  Prior to 10-Mar-91 

To weigh a boat, the following equipment may be included, but must, if included during the weighing, be on the boat whenever she is racing: 
 

A. spinnaker pole	D.  jib sheets
B. whisker pole	E.  main sheet
C. spinnaker sheets

5.  Spinnaker Hoist Measurement      Adopted:  Prior to 10-Mar-91 

For purpose of measuring the spinnaker hoist, the measurement shall be taken from the deck to the bottom of the sheave that turns the halyard.

6.  Jib Foot Roach Measurement      Adopted:  November 1991 

For measurement of the jib foot roach in Article V Section 1, the sail may be flaked once above the line connecting the tack and clew.

7.  Deck and Hull Construction Methods      Adopted:  February 1993 

In order to avoid presentation in detail of the proposed construction methods and materials prior to construction, a deck must meet the following specifications:

Material : Solid Wood 7/16"

Deck Beams: 1" x 2" Spruce at 12" intervals

8.  Hollows      Revised: 14-Mar-94 

A hollow in the edge of a sail between adjacent batten pockets, the head point and adjacent batten pocket, or the clew point and adjacent batten pocket at a measurement point shall be bridged by a straight line and the measurement taken through the measurement point to the bridging line.

9.  Batten Positions      Adopted:  14-Mar-94 

The batten lengths are specified in Section 2 of Article V Sails.  The battens may be positioned anywhere on the leech of the sail and still “be of the type as shown on the plans”.

10. Clew Plate      Adopted:  30-Apr-94 

The clew attachment of the jib may be a single grommet or a clew plate with multiple attachment points.  Clew plates are subject to the following limitations:

1. Not more than six inches in any direction;
2. Does not alter the clew measurement point;
3. Does not add to the foot roach that the sail supports; and
4. Does not alter the curve of the leech by functioning as a batten. 

11.  Deck and Hull Repair      Adopted: 15-Jan-95

Revised: 16-Nov-02 

Although new fiberglass decks must come from an approved builder, any person can repair a fiberglass deck to approximately its original appearance and shape.  Persons contemplating more than simple repair must seek the prior approval of the Chief Measurer and describe the nature and method of the repair completely.  The repair must meet the following minimum requirements:

A. After repair, the hull and deck must be capable of fitting back into its original mold, i.e. the repair must not modify the shape on the outer (gelcoat) side in such a way as to interfere with the body of the mold;
B. After repair, the boat must contain at least the amount of flotation as when it was built.  If foam has been removed after the original manufacturing date, it must be replaced at this time;
C. The materials used in the repair must be equal to or greater than the original materials in weight, thickness, and strength; and
D. The interface between the repaired area and the original deck must be carefully sealed to avoid water intrusion into the core of the deck or hull.

12.  Spinnaker Block                  Adopted: 05-May-2001

The spinnaker block must be mounted to the front of the mast without any attempt to extend.

13. Spar Extrusions               Adopted 27-Nov-04

Spar extrusions may not be cut away, other than openings just sufficient for through-fittings, at any point inboard of the outer edge of the racing bands.

14. Deck Material or Static Equipment                 Adopted 12-Feb-05

Material and/or static equipment which is affixed to the deck during racing is part of the deck for purposes of Specifications Article III, Section 9 Deck Requirements.

PLANS - In .PDF format. Click to open, and save while open; or, right-click and click "Save Target As ...."
 
 

Page 1 - Title Sheet	Page 2 - Hull Layout	Page 3 - Hull Layout	Page 4 - Deck Layout
Page 5 - Wood Deck Framing	Page 6 - Centerboard and Deck Details	Page 7 - Centerboard Trunk	Page 8 - Cut-Down Centerboard
Page 9 - Spar Details	Page 10 - Spar Sections	Page 11 - Rudder Plan	Page 12 - Sail Plan
Page 13 - Spinnaker, Insignia

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