For the purposes of funding (1) grants to projects that have received approval of the Department of Administrative Services pursuant to sections 10-287 and 10-287a, subsection (a) of § 10-65 and § 10-76e, (2) grants to assist school building projects to remedy safety and health violations and damage from fire and catastrophe, and (3) technical education and career school projects pursuant to § 10-283b, the State Treasurer is authorized and directed, subject to and in accordance with the provisions of § 3-20, to issue bonds of the state from time to time in one or more series in an aggregate amount not exceeding thirteen billion six hundred twelve million one hundred sixty thousand dollars. Bonds of each series shall bear such date or dates and mature at such time or times not exceeding thirty years from their respective dates and be subject to such redemption privileges, with or without premium, as may be fixed by the State Bond Commission. They shall be sold at not less than par and accrued interest and the full faith and credit of the state is pledged for the payment of the interest thereon and the principal thereof as the same shall become due, and accordingly and as part of the contract of the state with the holders of said bonds, appropriation of all amounts necessary for punctual payment of such principal and interest is hereby made, and the State Treasurer shall pay such principal and interest as the same become due. The State Treasurer is authorized to invest temporarily in direct obligations of the United States, United States agency obligations, certificates of deposit, commercial paper or bank acceptances such portion of the proceeds of such bonds or of any notes issued in anticipation thereof as may be deemed available for such purpose.