(1) By action or proceeding for legal or equitable remedies, enforce their rights against the city and any of its officers, agents and employees, and may require and compel the city or any such officers, agents or employees to perform and carry out its and their duties and obligations under ORS 280.410 to 280.485 and its and their covenants and agreements with bondholders;
(2) By action, require the city to account as if it was the trustee of an express trust;
(3) By action, enjoin any acts or things which may be unlawful or in violation of the right of the bondholders;
(4) Bring action upon the bonds;
(5) Foreclose any mortgage or lien given under the authority of ORS 280.410 to 280.485 and cause the property standing as security to be sold under any proceedings permitted by law or equity; and
(6) Exercise any right or remedy conferred by ORS 280.410 to 280.485 without exhausting and without regard to any other right or remedy conferred by ORS 280.410 to 280.485 or any other law of this state, none of which rights and remedies is intended to be exclusive of any other, and each is cumulative and in addition to every other right and remedy. [1977 c.772 §15; 1979 c.284 §131]