Terminology: Owner
The term 'owner' is not defined in the Racing Rules of Sailing and is therefore used in the sense ordinarily understood in nautical or general use.
Rule 32.1, Shortening or Abandoning After the Start
The race committee may abandon a race even after one or more boats have finished.
Rule 61.1, Informing the Protestee
The purpose of rule 61.1 is to make sure that the protestee is informed about the protestor’s intention to protest.
Rule 75.1, Entering a Race
The number of boats entered in a race is the number of boats that complied with the requirements of the organizing authority.
Rule 31; Touching a Mark
It is not seamanlike to compel a boat to touch a mark even if she does not break a rule by doing so. 
Rule 31; Touching a Mark
The race committee vessel becomes part of the mark when the race committee intentionally attaches the vessel to the mark, therefore, a boat racing that touches the race committee vessel breaks rule 31.
Rule 16.1; Changing Course
Definition Keep Clear
The definition Keep Clear (b) is a test that decides whether a boat is keeping clear of another either under rule 11  or under rule 10 when sailing downwind on opposite tacks, while rule 16.1 puts a limitation on the rights of a right-of-way boat.
Rule 62.1
A boat may protest or request redress for an incident during a practice race. If there is damage to the boat entitled to redress such that repairs expand over subsequent races, redress may be given for those races.
Rule 55; Trash Disposal
The Notice of Race or the Sailing Instructions of an event can change or delete rule 55.
Rule 89.1
Authorizing a club to organize an event does not make a class part of the organizing authority.