Me. Rev. Stat. tit. 32, § 5507

The Director of the Office of Professional and Occupational Regulation, pursuant to Title 10, section 8003, subsection 2‑A, paragraph D, may establish by rule fees for purposes authorized under this chapter in amounts that are reasonable and necessary for their respective purposes, except that the fee for a purpose may not exceed $100 annually. Rules adopted pursuant to this section are routine technical rules as defined in Title 5, chapter 375, subchapter 2‑A.