In early closing events if six separate interests are declared in to start, the race must be contested. If fewer interests are declared in than are required to start the race may be declared off and the horse or horses on the grounds properly declared in to race shall be entitled to all of the entrance money and forfeits from each horse named. Stakes and futurities must be raced if one or more horses are declared in to start, except if postponed under this Subchapter.