The rules listed in the definition Rule apply to races governed by The Racing Rules of Sailing whether or not the notice of race explicitly states that they apply. A rule in the notice of race or the sailing instructions, provided it is consistent with any prescription to rule 88.2, may change some or all of the prescriptions of the national authority. Generally, the notice of race may not change a class rule. When a boat races under a handicapping or rating system, the rules of that system apply, and some or all of her class rules may apply as well. When the notice of race conflicts with the sailing instructions, neither takes precedence.