Notwithstanding any general or special law to the contrary, the amounts transferred under subdivision (1) of section 22C of chapter 32 of the General Laws shall be made available for the Commonwealth's Pension Liability Fund established by section 22 of said chapter 32. The amounts transferred under said subdivision (1) of said section 22C of said chapter 32 shall meet the commonwealth's obligations under said section 22C of said chapter 32, including retirement benefits payable by the state employees' and the state teachers' retirement systems, for the costs associated with a 3 per cent cost of living adjustment, under section 102 of said chapter 32, for the reimbursement of local retirement systems for previously authorized cost of living adjustments under said section 102 of said chapter 32 and for the costs of increased survivor benefits under chapter 389 of the acts of 1984. The state board of retirement and each city, town, county and district shall verify these costs, subject to the rules adopted by the state treasurer. The state treasurer may make payments upon a transfer of funds to reimburse certain cities and towns for pensions to retired teachers, including any other obligations which the commonwealth has assumed on behalf of any retirement system other than the state employees'or state teachers' retirement systems and also including the commonwealth's share of the amounts to be transferred under section 22B of said chapter 32 and the amounts transferred under clause (a) of the last paragraph of section 21 of chapter 32 of the General Laws. All payments for the purposes described in this section shall be made from the fund and any distribution and the payments for which distributions are required shall be detailed in a written report filed quarterly by the secretary of administration and finance with the house and senate committees on ways and means and the joint committee on public service in advance of this distribution. Distributions shall not be made in advance of the date on which a payment is actually to be made. The state board of retirement may expend an amount for the purposes of the board of higher education's optional retirement program under section 40 of chapter 15A of the General Laws. To the extent that the amount transferred under said subdivision (1) of said section 22C of said chapter 32 exceeds the amount necessary to adequately fund the annual pension obligations, the excess amount shall be credited to the Pension Reserves Investment Trust Fund, established by subdivision (8) of section 22 of said chapter 32, to reduce the unfunded pension liability of the commonwealth.