Maryland Code, Corporations and Associations § 4-101

(a) In this title the following words have the meanings indicated.

(b) “Close corporation” means a corporation which elects to be a close corporation in accordance with § 4-201 of this title.

(c) “Unanimous stockholders' agreement” means an agreement to which every stockholder of a close corporation actually has assented and which is contained in its charter or bylaws or in a written instrument signed by all the stockholders.