Mass. Gen. Laws ch. 90, § 39C

The commission is hereby authorized to expend such sums as may be appropriated for the purpose of reimbursing cities or towns for airport construction as provided in section thirty-nine F. Such reimbursements shall be subject to the provisions and restrictions of said section thirty-nine F and of section fifty-one K, and the commission may, without appropriation, receive and distribute such federal funds as may be available therefor; provided, that such expenditures are otherwise in accordance with law.