Me. Rev. Stat. tit. 33, § 51 (2025)
No action shall be maintained in any of the following cases:
8. Agreement to refrain from carrying on any business Upon any agreement to refrain from carrying on or engaging in any trade, business, occupation or profession for any term of years or within any defined territory or both; the provisions of this subsection shall not apply to any such agreement made prior to August 13, 1947; unless the promise, contract or agreement on which such action is brought, or some memorandum or note thereof, is in writing and signed by the party to be charged therewith, or by some person thereunto lawfully authorized; but the consideration thereof need not be expressed therein, and may be proved otherwise.
unless the promise, contract or agreement on which such action is brought, or some memorandum or note thereof, is in writing and signed by the party to be charged therewith, or by some person thereunto lawfully authorized; but the consideration thereof need not be expressed therein, and may be proved otherwise.