The corporate powers of the city shall be vested in the council and shall be exercised only as directed or authorized by law. All powers of the council shall be exercised by code, ordinance, resolution, order or motion. The ability of the city to be legally bound shall be limited by the provisions of SCC 2.15.090. [Code 2006 § 2-1-2. Ord. 96-12, 7-23-1996].