SECTION 1. Section 13 of chapter 58 of the General Laws, as appearing in the 2020 Official Edition, is hereby amended by striking out the definition of “Reimbursement percentage”.

SECTION 2. Section 15 of said chapter 58, as so appearing, is hereby amended by striking out, in lines 6 and 7, the words “reimbursement percentages”.

SECTION 3. Section 16 of said chapter 58, as so appearing, is hereby amended by striking out, in lines 2 and 3, the words “reimbursement percentage”.

SECTION 4. Said chapter 58 is hereby further amended by striking out section 17, as so appearing, and inserting in place thereof the following section:-

Section 17. Annually, not later than November 20, the state treasurer shall reimburse each city and town in which state-owned land is located, an amount in lieu of taxes upon the value of such land as reported by the commissioner under section 16, determined by multiplying each $1,000 of valuation, or fractional part thereof, by the rate and in an amount provided for at a  rate equal to the average of the annual rates for the 3 years preceding that in which such value is laid, said annual rates to be determined by an apportionment of the whole amount of money to be raised by taxation upon property in the commonwealth during each of the 3 preceding years, as returned by the assessors of each city and town under this section and approved by the commissioner, upon the aggregate valuation of all cities and towns for each of the 3 preceding years, as returned under section 10C; provided, however, that the amount reimbursed shall not be less than that paid in the prior year, except for the value of land removed from the annual statement of fair cash valuation.