Except as otherwise provided in Part III of this subtitle or §§ 10–14A–03 and 10–14B–03 of the State Government Article, a person shall be licensed by the Board as an elevator mechanic before the person erects, constructs, wires, alters, replaces, maintains, repairs, dismantles, or services elevator units in the State. Except as otherwise provided in Part III of this subtitle or §§ 10–14A–03 and 10–14B–03 of the State Government Article, a person shall be licensed by the Board as an elevator contractor before the person engages in the business of erecting, constructing, wiring, altering, replacing, maintaining, repairing, dismantling, or servicing elevator units in the State. Except as otherwise provided in Part III of this subtitle or §§ 10–14A–03 and 10–14B–03 of the State Government Article, a person shall be licensed by the Board as an elevator renovator contractor before the person engages in the business of elevator renovating. By June 1, 2004, a person who engages in the business of elevator renovating for a business incorporated before January 1, 2002, shall be licensed by the Board as an elevator renovator contractor before the person engages in the business of elevator renovating. Except as otherwise provided in Part III of this subtitle or §§ 10–14A–03 and 10–14B–03 of the State Government Article, a person shall be licensed by the Board as an elevator renovator mechanic before the person performs elevator renovator work. Except as otherwise provided in Part III of this subtitle or §§ 10–14A–03 and 10–14B–03 of the State Government Article, a person shall be licensed by the Board as an accessibility lift mechanic before the person erects, constructs, wires, alters, replaces, maintains, repairs, dismantles, or services commercial stairway chairlifts, vertical platform lifts, or incline platform lifts in the State. A licensed elevator contractor is not required for removing or dismantling an elevator unit if: the elevator unit is destroyed as a result of a complete demolition of a building; or a hoistway or wellway is demolished back to the basic support structure. An individual who works as an elevator apprentice under the direct supervision of a licensed elevator mechanic or licensed elevator renovator mechanic need not obtain a license. An individual commonly known as an elevator helper who works under the direct supervision of a licensed elevator mechanic or a licensed elevator renovator mechanic need not obtain a license. An elevator refinisher need not obtain a license. A crane mechanic performing work on elevators or lifts located on a port facility owned, leased, or operated by the Maryland Port Administration need not obtain a license. A person installing a residential stairway chairlift need not obtain a license. A person who is licensed under this subtitle as an elevator mechanic need not obtain a license to provide the services described in subsection (e) of this section. The Board shall adopt regulations, including education and experience requirements, to certify accessibility lift mechanic specialists to erect, construct, wire, alter, replace, maintain, repair, dismantle, or service private residential elevators. Until the Board adopts regulations to certify accessibility lift mechanic specialists to perform work on private residential elevators, an accessibility lift mechanic may provide the services described in paragraph (1) of this subsection. A candidate actively completing the certification requirements adopted by the Board under paragraph (1) of this subsection may continue to perform that work without certification for up to 4 years after the effective date of the regulations.