(3) The following fees are due and payable to the commission for each gaming establishment:

1. (a) An annual license fee, as provided by M.G.L. c. 23K, § 56(a), of $600 for each slot machine approved by the commission for operation at a gaming establishment (the Slot Fee); and
2. (b) An annual assessment, (Annual Assessment) as provided by M.G.L. c. 23K, § 56(c), to be determined by the commission and calculated in accordance with M.G.L. c. 23K, § 56(c) to cover costs of the commission necessary to maintain control over gaming establishments, in proportion to the number of gaming positions approved by the commission at the gaming establishment; provided, however, that such assessment may be adjusted by the commission at any time after payment is made where required to reflect the actual number of positions at a gaming establishment, and accordingly, the payment of additional funds may be required or a credit may be issued towards the payment due the following year; and
3. (c) An annual fee, as provided by M.G.L. c. 23K, § 56(e) reflecting each gaming establishment's share of at least $5,000,000 to be deposited into the Public Health Trust Fund in proportion to the number of gaming positions projected for the gaming establishment; provided, however, that such assessment may be adjusted by the commission at any time after payment is made where required to reflect the actual number of gaming positions at a gaming establishment, and accordingly, the payment of additional funds may be required or a credit may be issued towards the payment due the following year; and
4. (d) any other such license fees required under M.G.L. c. 23K and required to be assessed by the commission.