There is created in the state treasury a permanent trust fund which shall be known as the “governor’s residence preservation fund”. The fund shall consist of all gifts, donations and bequests of money to the governor’s residence advisory commission as well as any appropriations made to the commission. Earnings from the investment of the fund shall be credited to the fund. Expenditure of the fund shall be only for the purposes for which the commission was created and shall be paid to the commission upon vouchers signed by the chairman of the commission and warrants issued by the secretary of finance and administration.