Mass. Gen. Laws ch. 58, § 17

The treasurer shall annually, reimburse each city and town in which state-owned land is located, an amount in lieu of taxes upon the reimbursement percentages reported to the treasurer by the commissioner under the preceding section, determined by multiplying the percentages by the amount appropriated for such purposes for the fiscal year. No reimbursements hereunder on account of lands owned by the commonwealth and under the care and control of the department of conservation and recreation and used for recreational or conservation purposes shall be made from the Inland Fisheries and Game Fund.