Me. Rev. Stat. tit. 23, § 1917-B

A person who takes, defaces or disturbs a sign placed within the public right-of-way in accordance with section 1913‑A, subsection 1, paragraph L commits a civil violation for which a fine of up to $250 may be adjudged. This section does not apply to a person authorized to remove signs placed within the public right-of-way in accordance with section 1913‑A, subsection 1, paragraph L.