PDFWAC 260-48-940
Head-to-head wagering.
(1) Head-to-head wagering requires the selection of the winning contestant in a designated contest or series of contests, in a competition between two or more equally matched betting interests, or based on the sportsmanship and/or skill of the jockeys and/or trainers, regardless of the official placing of the other betting interests in that contest or series of contests.
(2) The choice of which contestants from a contest will participate in the head-to-head contest will be made as follows:
(a) The association must obtain approval from the board of stewards for each head-to-head contest.
(b) The matching of contestants for the head-to-head contest will be limited to contestant versus contestant, jockey versus jockey, and/or trainer versus trainer.
(c) The contestants chosen for the head-to-head wager will be conspicuously identified in the official program.
(3) The net head-to-head pool will be distributed to winning wagers in the following precedence, based on the official order of finish:
(a) As a single price pool to those whose selection finished first in a single head-to-head contest, or first in the greatest number of a series of head-to-head contests; but if there are no such wagers, then
(b) The head-to-head pool will be refunded.
(4) If there is a dead heat in a contest involving two or more of the contestants in:
(a) A single-contest head-to-head pool, then the entire pool will be refunded.
(b) One or more contests of a series, then all the contestants involved in the dead heat will be considered winners and the net pool will be distributed as a signal price pool, provided that;
(c) In a series of contests, if there is a dead heat in half or more of the contests then the head-to-head pool for those contests will be refunded.
(5) If any head-to-head contest is canceled or declared no contest:
(a) In a single-contest head-to-head pool, the pool will be refunded.
(b) In a series of contests, if half or more of the contests are canceled or declared no contest, then the head-to-head pool for those contests will be refunded.
(6) If any contestant is scratched or declared a nonstarter in any head-to-head contest, then that contest will be canceled.
(7) If all contestants fail to finish in a head-to-head contest, then that contest will be canceled.