Subject to the approval of the State Bond Commission, any expense incurred in connection with entering upon necessary contracts, the rehabilitation of projects constructed under section 25-72 which have been subjected to unusual and unanticipated hurricane and storm damages, and similar expenses, shall be paid from the accrued interest and premiums or from the proceeds of the sale of the bonds and notes authorized by section 25-73 and in the same manner as other obligations of the state of Connecticut.