In addition to the powers enumerated in Section 16 of this act,¹ every corporation, its officers, directors and shareholders shall possess and may exercise all the powers and privileges granted by the provisions of the Oklahoma General Corporation Act² or by any other law or by its certificate of incorporation, together with any powers incidental thereto, so far as such powers and privileges are necessary or convenient to the conduct, promotion or attainment of the business or purposes set forth in its certificate of incorporation.