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 prohibition against age discrimination in paragraph 6 of section 4 of chapter 151B of the General Laws, structures expressly for use as housing for persons 55 years of age or older may be constructed on parcel M-137 in the town of Groton, notwithstanding the failure of said parcel to contain at least five acres.