Me. Rev. Stat. tit. 13, § 1976

No person, firm, corporation or association, domestic or foreign, hereafter commencing business in this State may use the word "cooperative" or "co-op" as a part of its corporate name, unless it has complied with this subchapter or some other statute of this State relating to cooperative associations. A foreign association organized under and complying with the cooperative law of the state of its creation shall be entitled to use the term "cooperative" or "co-op" in this State if it has obtained the privilege of doing business in this State.