While a boat is racing, her owner and any other person in charge shall ensure that the boat is maintained to comply with her class rules and that her measurement or rating certificate, if any, remains valid. In addition, the boat shall also comply at other times specified in the class rules, the notice of race or the sailing instructions. When a rule provides that the penalty for a breach of a class rule may be less than disqualification, the same penalty will apply to a breach of this rule.