An Act amending the act of August 6, 1936 (Sp.Sess., P.L.95, No.38 1/2), entitled "An act to authorize and empower cities, boroughs, towns, and townships, separately or jointly, to provide for protection against floods by erecting and constructing certain works and improvements, located within or without their territorial limits, and within or without the county in which situate; and to expend moneys and incur indebtedness; to assess benefits against property benefited; to issue improvement bonds imposing no municipal liability; and to acquire, take, injure or destroy property for such purposes," further providing for competitive bidding of contracts.