(a) A shareholders' agreement authorized by this subchapter that limits the discretion or powers of the board of directors or supplants the board of directors relieves the directors of, and imposes on a person in whom the discretion or powers of the board of directors or the management of the business and affairs of the corporation is vested, liability for an act or omission of the person in accordance with Subsection (b).
(b) A person on whom liability for an act or omission is imposed under this section is liable in the same manner and to the same extent as a director on whom liability for an act or omission is imposed by this code or other law.