86.1c Class rules may change only racing rules 41,49,50,51,52,53,and 54.
86.1a places limits on what a "National Authority" may change. I would suggest more than a "quick glance"
How do you interpret 86.1b?
86.1a prohibits change to Definitions; a rule in the Introduction; Sportsmanship and the Rules; Parts 1, 2, or 7; Rule 42, 69, 70, 71, 75, 76.2, 79, or 80; a rule of an appendix that changes one of these rules; Appendix H or N; or ISAF Regulation 19, 20, 21, or 22.
All of this qualified by 86.1 A racing rule shall not be changed unless permitted in the rule itself or as follows:
