b) In the event a mandatory distribution is required, the following precedence will be followed in determining winning wagers for the second twin trifecta contest, based upon the official order of finish:

1. 1) As a single price pool to those who selected the first three finishers in exact order; but if there are no such wagers, then
2. 2) As a single price pool to those whose combination correctly selected the first and second place finishers in correct order; but if there are no such wagers, then
3. 3) As a single price pool to those whose combination correctly selected the first place betting interest; but if there are no such wagers, then
4. 4) As a single price pool to those whose combination correctly selected the second and third place finishers in exact order; but if there are no such wager, then
5. 5) As a single price pool to those whose combination correctly selected the second place betting interest; but if there are no such wagers, then
6. 6) As a single price pool to those whose combination correctly selected the third place betting interest; but if there are no such wagers, then
7. 7) As a single price pool to holders of valid exchange tickets.

c) In the event no valid exchange tickets are issued the carryover shall be distributed in the following precedence, based upon the official order of finish:

1. 1) As a single price pool to those whose combination correctly selected the first and second place betting interests in the first twin trifecta contest; but if there are no such wagers, then
2. 2) As a single price pool to those whose combination correctly selected the first place finisher in the first twin trifecta contest; but if there are no such wagers, then
3. 3) As a single price pool to those holding first half twin trifecta wagers.