Every authority of this State may, from time to time and in the manner hereinafter provided, amend its articles of incorporation and thereby accomplish any 1 or more of the following: The adoption of a new name, changes in, additions to and diminutions of its powers and purposes, provided that such amendment shall contain only such provisions as it would be lawful or proper to insert in articles of incorporation made at the time of such amendment.
16 Del. C. § 1403