Conn. Gen. Stat. § 16-338
Bonds authorized or issued prior to July 1, 1974. Legal investments, tax-exempt
All bonds authorized or issued pursuant to this section under or pursuant to proceedings of the State Bond Commission had or taken prior to July 1, 1974, shall be general obligations of the state and the full faith and credit of the state of Connecticut are pledged for the payment of the principal of and interest on sa…