N.J. Admin. Code § 13:71-21.4
If the placing system is specified in the conditions, the purse shall be distributed according to the standing of the horses in the summary. In order to share in the purse distribution, each horse must complete the race and compete in each heat to which he is eligible. A horse must win two heats to be declared the race winner and such horse shall stand first in the summary. In deciding the rank of the horses order than the race winner, a horse that has been placed first in one heat shall be ranked better than any other horse making a dead heat for first or any other horse that has been placed second any number of heats; a horse that has been placed second in one heat shall be ranked better than any other horse that has been placed third any number of heats, and so forth; for example, a horse finishing, 3-6 would be ranked ahead of another horse finishing 4-4. A horse finishing in a dead heat would be ranked below another horse finishing in the same position and not in a dead heat. If there be any premium for which no horse has maintained a position, it shall go to the race winner, but the number of premiums awarded need not exceed the number of horses that started in the race. Unless otherwise specified in the conditions, the money shall be divided 50 percent, 25 percent, 15 percent and 10 percent.
N.J. Admin. Code § 13:71-21.4