The fund for such grants must be from either revenue-sharing trust funds or from general appropriations to the Department of Health and Environmental Control, which shall administer the grants for intermission to public water supply authorities or districts, sewer authorities or districts, water and sewer authorities, rural community water or sewer systems, nonprofit corporations, or municipal sewer systems to which the grant is made. The Governor, with the advice and consent of the Senate, shall appoint an advisory committee composed of seven members, one from each congressional district of the State. In addition an employee of the Department of Health and Environmental Control, designated by the commissioner thereof, shall serve ex officio as a member of the committee. The Governor may invite a director, or his representative, from an agency providing water and sewer funds to serve as an advisory nonvoting member to the committee. All members must be appointed for terms of three years. In the event of a vacancy a successor shall be appointed for the unexpired term in the manner of original appointment. The advisory committee shall meet as soon after its appointment as may be practicable and shall organize by electing a chairman, vice chairman, secretary, and such other officers as it may deem desirable. The advisory committee shall select the projects to be funded pursuant to § 6-19-40. Funds also may be expended from gifts or grants from any source which are made available for the purpose of carrying out the provisions of this chapter. Appropriations made to the fund but not expended at the end of the fiscal year for which appropriated shall not revert to the general fund but shall accrue to the credit of the fund. Grants must be made only for water supply and waste water facilities projects on which construction was not commenced before April 1, 1974.