The Treasurer is authorized to invest or reinvest the civil list funds and all other funds under the Treasurer’s control in United States government obligations, United States agency obligations, shares or interests in an investment company or investment trust registered under the Investment Company Act of 1940, whose portfolio is limited to obligations of the United States, its agencies or instrumentalities, or repurchase agreements fully collateralized by such obligations, United States postal service obligations, certificates of deposit, commercial paper, savings accounts and bank acceptances. The Treasurer may also invest or reinvest such funds exclusive of civil list funds in the sale or acquisition of securities or obligations which the Treasurer is authorized to sell or acquire for purposes of any combined investment fund established pursuant to § 3-31b, subject to repurchase agreements in the manner in which such agreements are negotiated in sales of such securities or obligations in the marketplace, provided the Treasurer shall not enter into such an agreement with any securities dealer or bank acting as a securities dealer unless such dealer or bank is included in the list of primary dealers, effective at the time of such agreement, as prepared by the Federal Reserve Bank of New York. The Treasurer is authorized to invest all or any part of any sinking fund in any bonds in which savings banks may legally invest, provided that the provisions of subsection (n) of § 36-96* shall not be applicable to any investment in such bonds, and provided such bonds mature prior to the maturity of such bonds of the state which are outstanding.