(1) the entire February first, two thousand six bill, calculated pursuant to section twenty-three-a of this article (without reference to this section), less the "amount eligible for amortization" determined pursuant to subdivision a of this section; and

(2) the first annual installment of the "amount eligible for amortization" determined pursuant to subdivision a of section three hundred seventeen-b of this article, if applicable. c. A participating employer making a payment pursuant to subdivision b of this section shall pay on February first, two thousand seven an amount determined by the comptroller by adding the following three amounts together:

(1) the entire February first, two thousand seven bill, calculated pursuant to section three hundred twenty-three-a of this article (without reference to this section), less the "amount eligible for amortization" determined pursuant to section three hundred seventeen-d of this article, if applicable;

(2) the first annual installment of the "amount eligible for amortization" determined pursuant to subdivision a of this section; and

(3) the second annual installment of the "amount eligible for amortization" determined pursuant to subdivision a of section three hundred seventeen-b of this article, if applicable. d. Amortized payments determined pursuant to section three hundred seventeen-b and pursuant to this section shall be due and payable on February first of each year during the applicable amortization period. The comptroller shall have the authority to permit the pre-payment of the remaining balance of the "amount eligible for amortization" determined pursuant to both such sections subject to the following:

(1) on or before November fifteenth, two thousand five in addition to the amount due for the current year billing and for the payment of the amortized annual installment determined pursuant to section three hundred seventeen-b and pursuant to this section, the comptroller shall advise the participating employer of the total amount due and be authorized to accept pre-payment in full of said amount by February first, two thousand six.

(2) on or before each November fifteenth thereafter, in addition to the amount due for the current year billing and for the payment of the annual amortized installments, the comptroller shall advise the participating employer of the total amount still outstanding and be authorized to accept the pre-payment of any balance remaining to be paid by February first of the succeeding year.