Be it enacted by the Senate and House of Representatives in General Court assembled, and by the authority of the same, as follows:

Notwithstanding the provisions of any general or special law to the contrary, the town of Shirley may provide for and permit the deferral of the payment of betterments assessed against agricultural, horticultural and recreational land under chapters 61A and 61B of the General Laws, in connection with the construction of the town's sanitary sewer collection system, as to both principal and interest, in the same manner and to the same extent permitted for betterments assessed against forest land under chapter 61 of the General Laws.