(b) The fund shall consist of: (i) payments made by program participants for the purchase of naloxone;(ii) revenue from appropriations or other monies authorized by the general court and specifically designated to be credited to the fund; and(iii) funds from public or private sources including, but not limited to, gifts, grants, donations, rebates and settlements received by the commonwealth that are specifically designated to be credited to the fund. Funds received under clauses (ii) or (iii) shall be apportioned in a manner determined by the department and shall be applied to provide price reductions for municipalities purchasing naloxone through the program, in addition to any discounts procured by the fund through bulk purchasing. Amounts credited to the fund shall not be subject to further appropriation and monies remaining in the fund at the end of a fiscal year shall not revert to the General Fund.The commissioner shall report annually not later than October 1 to the house and senate committees on ways and means on the fund's activity. The report shall include, but not be limited to, revenue received by the fund, revenue and expenditure projections for the forthcoming fiscal year and details of all expenditures from the fund, participants in the program, the amount of naloxone purchased by each participant and the discount procured through bulk purchasing.