The provisions of this article to the extent that they relate to the Unemployment Trust Fund, shall be operative only so long as that fund continues to exist and so long as the Secretary of the Treasury of the United States of America continues to maintain for this State a separate book account of all funds deposited therein by this State for benefit purposes, together with this State’s proportionate share of the earnings of the Unemployment Trust Fund, from which no other state nor the United States is permitted to make withdrawals. If and when such Unemployment Trust Fund ceases to exist, or such separate book account is no longer maintained, all money, properties, or securities therein, belonging to the Unemployment Fund of this State shall be transferred to the treasurer of the Unemployment Fund, who shall hold, invest, transfer, sell, deposit, and release such money, properties, or securities in a manner approved by the director in accordance with the provisions of this division. Such money shall be invested in bonds or other interest-bearing obligations of the United States of America or the State of California. Such investment shall at all times be so made that all the assets of the fund shall always be readily convertible into cash when needed for the payment of benefits. The Treasurer shall dispose of securities or other properties belonging to the Unemployment Fund only under the direction of the director.