§ 13. Articles of incorporation. Articles of incorporation of a cooperative shall recite that they are executed pursuant to this chapter and shall state: (1) the name of the cooperative; (2) the address of its principal office; (3) the names and addresses of the incorporators; and (4) the names and addresses of its directors; and may contain any provisions not inconsistent with this chapter deemed necessary or advisable for the conduct of its business. Such articles shall be signed by each incorporator and acknowledged by at least two of the incorporators, or on their behalf, if they are cooperatives. It shall not be necessary to recite in the articles of incorporation of a cooperative the purpose for which it is organized or any of its corporate powers.