Any municipality or public authority hereinabove set forth, either jointly or severally, may enter into contracts with the United States of America, or any agency thereof, under the provisions of the National Industrial Recovery Act and the regulations made in pursuance thereof, and under any further acts of Congress of the United States to encourage public works, for the sale of bonds issued in accordance with the provisions of this article, or for the acceptance of a grant to aid such municipality or other public authority to acquire, build, or improve any toll bridge, or to enter into contracts with any person or corporation, public or private, for the sale of such bonds. Such contracts may contain such terms and conditions as may be agreed upon by and between the municipality, or other public authority, and the United States of America, any agency thereof, or any purchaser of such bonds. This and all other provisions of this article shall apply to code municipalities of the State of Mississippi or special charter cities of the State of Mississippi alike. In event of special charter cities of the State of Mississippi, no amendment to the charter of such municipality shall be necessary in order for such municipality to have advantage of this article, but such municipality shall have such advantage by simply spreading upon the minutes of its governing board of authority by resolution or ordinance the fact that same desires to come under the provisions of this article, in which event such municipality or any other political authority of the State of Mississippi hereinabove named shall have full power to adopt such ordinance and resolution and to do all things and perform all acts necessary or right or desirable to effectuate the full intent and purpose of this article.