Section 3. The act, approved the twenty-first day of May, one thousand nine hundred forty-three (Pamphlet Laws 591), entitled 'An act authorizing the mayor, controller and treasurer of any city or county of the first class, during the continuance of the hostilities incident to the present war, and for six months thereafter, to invest money in the treasury of such city or county not required for immediate use in certain obligations of the United States Government, and to sell or have the same redeemed," and all other acts and parts of acts inconsistent herewith are hereby repealed.