In exception to rule 86.1, World Sailing may in limited circumstances authorize changes to the racing rules for a specific international event. The authorization shall be stated in a letter of approval to the organizing authority and in the notice of race, and the letter shall be posted on the official notice board.
Rule 86.1
A racing rule shall not be changed unless permitted in the rule itself or as follows: - (a) Prescriptions of a national authority may change a racing rule, but...
Rule 86.3
If a national authority so prescribes, the restrictions in rule 86.1 do not apply if rules are changed to develop or test proposed rules. The national authority...
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