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 not the Definitions; a rule in the Introduction; Part 2 or 7; rule 1, 2, 3, 5, 6, 42, 43, 47, 50, 63.3, 69, 70, 71, 72, 75, 76.2(b) or 79; a rule of an appendix that changes one of these rules; Appendix H or N; or a rule in a World Sailing Code listed in rule 6.1.
• (b) The notice of race or sailing instructions may change a racing rule, but not rule 4, 76.1 or 76.2(a), Appendix R, or a rule listed in rule 86.1(a).
• (c) Class rules may change only racing rules 42, 49, 51, 52, 53, 54, 55, and 78.2.