(a) Prizes for a variation of the Lotto game shall be calculated as follows:

1. (1) The first prize will be a prize of up to an amount designated by the commission, which will be paid as a lump sum. A first prize will be awarded to game panels matching six of six winning numbers for a particular drawing. The commission may limit the number of top first prizes for a particular drawing to no more than a designated number. If the limited number of top first prizes designated by the commission exceeded for a particular drawing, the winning first prize game panels will share equally in a maximum first prize pool equal to the product of the top first prize amount multiplied by the limited number of top first prizes designated by the commission. At the commission’s discretion, the commission may change the top first prize amount and any such change will be publicly announced in advance of the effective date.
2. (2) Prizes paid to the second through fourth prize levels shall be fixed prizes as prescribed by the commission. There shall be a limit imposed on the second through fourth prize levels equal to a fixed percentage of the gross ticket sales receipts for that particular drawing. In the event that the limit would be exceeded for a particular draw, the second through fourth prize levels shall be calculated on a pari-mutuel basis in accordance with a formula established by the commission.
3. (3) The allocation of percentages of the prize pool to various prize categories may be changed by the commission from time to time. Any such change will be publicly announced by the commission.