(1) When two or more horses owned by the same owner or trained by the same trainer are entered or run in a race, the licensee shall ensure that such horses are coupled in the betting as an entry.

(2) Horses separately owned or trained may be coupled as an entry, for the purpose of parimutuel wagering, by the presiding steward, where it is deemed necessary to do so to protect the public interest.

(3) A wager on one horse of an entry or a mutuel field shall be considered a wager on all horses so coupled in that particular entry of mutuel field.   Entries shall not be uncoupled in dealing with the parimutuel wagering except as otherwise provided.

(4) If no money has been wagered to place on a horse which is placed first or second in a race, the place pool for that race shall be apportioned among holders of place tickets on the other horse which was placed first or second.

(5) If no money was wagered to show on a horse which is placed first, second or third in a race, the show pool in that race shall be apportioned among the holders of show tickets on the other horses which are placed first, second, or third in that race.

(6) The win pool shall be calculated as follows:

(a) Deduct 20%.   Deduct the value of the winning tickets.   Divide the net pool by the value of tickets on the winning horse.   Pay off at the result obtained multiplied by the purchase price of each ticket, plus the purchase price of each ticket.

(7) The place pool shall be calculated as follows:

(a) Deduct 20%.   Deduct the total value of the two winning tickets.   Allot half the net pool to each horse.   Divide by the value of tickets on each winning horse.   Pay off at the result obtained multiplied by the dollar amount wagered by each bettor, plus the purchase price of each ticket.

(8) The show pool shall be calculated as follows:

(a) Deduct 20%.   Deduct the total value of the three winning tickets.   Allot one-third of the net pool to each horse.   Divide the value of tickets on each winning horse. Pay off at the result obtained multiplied by the dollar amount wagered by each bettor, plus the purchase price of each ticket.