(a) The treasurer of Bristol county, with the approval of the county commissioners, may borrow $1,100,000 from the water pollution abatement trust established in chapter 29C of the General Laws for the repair, renovation, construction, equipping and furnishing of sewer extension facilities for the Bristol County Agricultural High School in the town of Dighton. The county commissioners may enter into a project regulatory agreement with the department of environmental protection to expend all funds available for the project and take any other action necessary to carry out the project.             (b) For purposes described in subsection (a), the county treasurer, with the approval of the county commissioners, may issue bonds or notes of the county to the water pollution abatement trust. The bonds or notes shall be signed by the county treasurer and countersigned by a majority of the county commissioners and shall be issued in such form and upon such terms and conditions as the county and the water pollution abatement trust shall agree in accordance with chapter 29C of the General Laws and consistent with this act. (c) For the purposes of this act, Bristol county shall constitute a regional local government unit under chapter 29C of the General Laws; provided, however, that those cities and towns within the county whose residents are eligible for free attendance at the Bristol County Agricultural High School pursuant to section 5 of chapter 566 of the acts of 1912 shall be deemed to be the service recipients of the county under sections 10 and 11 of said chapter 29C and maturing principal and interest on indebtedness incurred by the county under this act shall be appropriated and assessed only upon those cities and towns.”