The City also shall have all powers conferred upon it and granted by Chapter 8 of the Official Code; and Article 4, Chapter 8-A; and Sections 2 and 8, Article 5, Chapter 8-A of the Official Code; provided, however, that the enumeration of the powers therein mentioned shall not operate to exclude the exercises of other powers fairly incidental thereto or reasonably implied and within the purposes of the Official Code; and the provisions of said sections shall be given full effect without regard to the common law rule of strict construction.