(a) when that bet includes the choice of a single winning horse,i. 4.5 per cent, if the overall average of stakes for each race card at the race track during the calendar year preceding the date on which that race is held, hereinafter called in this section the “overall average of stakes”, is less than $100 000;
ii. 5 per cent, if the overall average of stakes is not less than $100 000 nor more than $150 000;
iii. 5.5 per cent, if the overall average of stakes is not less than $150 000 nor more than $200 000;
iv. 6 per cent, if the overall average of stakes is not less than $200 000 nor more than $250 000;
v. 6.5 per cent, if the overall average of stakes is not less than $250 000 nor more than $300 000;
vi. 7 per cent, if the overall average of stakes is $300 000 or more; and
(b) when that bet includes the choice of more than one winning horse,i. 9 per cent, if the overall average of stakes is less than $100 000;
ii. 9.5 per cent, if the overall average of stakes is not less than $100 000 nor more than $150 000;
iii. 10 per cent, if the overall average of stakes is not less than $150 000 nor more than $200 000;
iv. 10.5 per cent, if the overall average of stakes is not less than $200 000 nor more than $250 000;
v. 11 per cent, if the overall average of stakes is not less than $250 000 nor more than $300 000;
vi. 11.5 per cent, if the overall average of stakes is $300 000 or more.
Where, during the calendar year preceding the date on which the race is held, there has been no bet made under a parimutuel system at horse races held at that race track, the Minister of Revenue shall determine the overall average of stakes.