Me. Rev. Stat. tit. 10, § 8009

Notwithstanding any other provision of law, upon expiration of a professional or occupational licensing board member's term, that member serves until a successor is appointed and qualified. The successor's term commences at the expiration of the preceding term, regardless of the date of appointment. A vacancy occurring prior to the expiration of a specified term must be filled by appointment of a similarly qualified individual as a replacement. The replacement member serves for the remainder of the unexpired term, regardless of the date of appointment.