The provisions of sections 31-261, 31-262 and 31-263 to the extent that they relate to the Unemployment Trust Fund shall be operative only as long as said Unemployment Trust Fund continues to exist and as long as the Secretary of the Treasury of the United States continues to maintain for this state a separate book account of all funds deposited therein by this state, together with this state’s proportionate share of the earnings of such Unemployment Trust Fund, from which only this state is permitted to make withdrawals. If and when, for any reason, such Unemployment Trust Fund ceases to exist or such separate book account is no longer maintained, all moneys, properties and securities therein belonging to the Unemployment Compensation Fund of this state shall be withdrawn by the Treasurer of this state, who shall deposit them in the Unemployment Compensation Fund. Thereafter, any such properties or securities shall be sold or otherwise disposed of only at the direction of the administrator, with the approval of the Governor. The Treasurer shall from time to time on request of the administrator as may be necessary for the payment of benefits under this chapter pay such moneys over to the administrator, who shall deposit and disburse such moneys as provided in § 31-263.