If the tax imposed by Title IX of the federal Social Security Act or any amendments thereto, or any other federal tax against which contributions under the Unemployment Compensation Law may be credited shall be amended or repealed by congress or held unconstitutional by the supreme court of the United States, with the result that no portion of the contributions required under that act may be credited against such federal tax, then that act by virtue of that fact, shall be suspended until the legislature shall meet and take action relative thereto, and any unobligated funds in the unemployment compensation fund, and returned by the United States treasurer because such federal Social Security Act is inoperative, shall be held in custody by the state treasurer under supervision of the secretary until the legislature shall provide for the disposition thereof.