In addition to all other rights which may be conferred on him, and subject only to any contractual restrictions binding upon him, an obligee may:
(a) By mandamus, suit, action, or proceeding, compel the agency and its members, officers, agents, or employees to perform each and every term, provision, and covenant contained in any contract of the agency with or for the benefit of the obligee, and require the carrying out of any or all such covenants and agreements of the agency and the fulfillment of all duties imposed upon it by this part.
(b) By suit, action, or proceeding in equity, enjoin any acts or things which may be unlawful, or the violation of any of the rights of the obligee.