An obligee of an authority shall have the right, in addition to all other rights, which may be conferred on such obligee, subject only to any contractual restrictions binding upon such obligee:
(1) By mandamus, suit, action or proceedings at law or in equity to compel said authority and the commissioners, officers, agents or employees thereof to perform each and every term, provision and covenant contained in any contract of said authority, with or for the benefit of such obligee, and to require the carrying out of any or all such covenants and agreements of said authority and the fulfillment of all duties imposed upon said authority by this act [this chapter].
(2) By suit, action or proceeding in equity, to enjoin any acts which may be unlawful, or the violation of any of the rights of such obligee of said authority.