(Al's note:  The official Rules do not have the Terminology paragraph here, but I think it is useful to have it here as a reminder.)

Terminology  A term used in the sense stated in the Definitions is printed in italics or, in preambles, in bold italics (for example, racing and racing). ‘Boat’ means a sailboat and the crew on board. ‘Race committee’ includes any person or committee performing a race committee function. Other words and terms are used in the sense ordinarily understood in nautical or general use.

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Part 2
When Boats Meet

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The rules of Part 2 apply between boats that are sailing in or near the racing area and intend to race, are racing, or have been racing. However, a boat not racing shall not be penalized for breaking one of these rules, except rule 23.1.

When a boat sailing under these rules meets a vessel that is not, she shall comply with the International Regulations for Preventing Collisions at Sea (IRPCAS) or government right-of-way rules. If the sailing instructions so state, the rules of Part 2 are replaced by the right-of-way rules of the IRPCAS or by government right-of-way rules.

CYA has provided Appendix Q for guidance when the International Regulations for Preventing Collisions at Sea apply.

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Section A
Right of Way

A boat has right of way when another boat is required to keep clear of her. However, some rules in Sections B, C and D limit the actions of a right-of-way boat.

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10  On Opposite Tacks
When boats are on opposite tacks, a port-tack boat shall keep clear of a starboard-tack boat.

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11 On the Same Tack, Overlapped
When boats are on the same tack and overlapped, a windward boat shall keep clear of a leeward boat.

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12  On the Same Tack, Not Overlapped
When boats are on the same tack and not overlapped, a boat clear astern shall keep clear of a boat clear ahead.

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13  While Tacking
After a boat passes head to wind, she shall keep clear of other boats until she is on a close-hauled course. During that time rules 10, 11 and 12 do not apply. If two boats are subject to this rule at the same time, the one on the other’s port side or the one astern shall keep clear.

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Definitions
Fundamental Rules
Part 2B - General Limitations
Part 2C - At Marks and Obstructions
Part 2D - Other Rules
Part 3- Conduct of a Race
Part 4 - Other Requirements When Racing
Part 5A - Protests
Part 5B - Hearings and Decisions
Part 5C - Gross Misconduct
Part 5D - Appeals