Notwithstanding any general statute, public act or special act, upon a determination by the Treasurer and approval by the State Bond Commission that unexpended proceeds of transportation related general obligation bonds of the state issued pursuant to section 3-20 and accounted for in a general obligation bond fund of the state established by the Treasurer are no longer required for any of the purposes or projects funded or remaining to be funded from amounts in such bond fund, the Treasurer is authorized to transfer all or any portion of said unexpended bond proceeds from such bond fund for further credit to (1) the Special Transportation Fund of the state established pursuant to section 13b-68, provided the debt service on the bonds from which such unexpended proceeds were derived is otherwise payable from the Special Transportation Fund as permitted by section 13b-69, or (2) the General Fund. For transfers to either fund, the Treasurer shall determine that such transfer shall not adversely affect the exclusion from gross income of the interest on the bonds from which such unexpended proceeds are derived, pursuant to Section 103 of the Internal Revenue Code of 1986 or any corresponding internal revenue code of the United States, as from time to time amended.