28.3 Except when Regulation 28.4 applies, interpretations of the Racing Rules by World Sailing shall be made only through publication of cases in The Case Book or The Call Books. The cases are authoritative interpretations and explanations of the rules. The calls are authoritative interpretations and explanations of the rules for the relevant discipline.
28.3.1 VThe Racing Rules Committee shall decide submissions for cases and calls. Such decisions may be referred to Council as provided for in Regulation 28.2.1(b).
28.3.2 Submissions or proposals for cases…, in English and including any necessary diagrams, shall be received at the World Sailing Secretariat before the deadline in Regulation 15.6. If a submission or proposal duplicates a published case…, the submission or proposal shall state why the proposed case…is preferable.
28.3.3 The following are guidelines for publishing cases in The Case Book:
(a) A case shall significantly clarify an important meaning of a rule or increase the understanding of a complex rule.
(b) A case shall not duplicate one already published. When a case is an improvement on an existing case it shall be included and the existing case deleted.
28.3.5 Following publication of a new edition of The Racing Rules of Sailing, the Racing Rules Committee shall promptly review and revise all related documents (including The Case Book...).
28.4 Except for the publication of the World Sailing case and call books, World Sailing shall not issue an authoritative interpretation or explanation of the Racing Rules unless it is first reviewed and approved by the Chairman of the Racing Rules Committee or a member of the committee designated by the Chairman.