4. Any person desiring to obtain an elevator, escalator, and moving walkway mechanic's license, which shall authorize such licensee to install, construct, alter, maintain, service, repair, or test elevators, escalators, and moving walkways, shall make application for licensure to the Elevator, Escalator, and Moving Walkway Mechanics Licensing Board, pay all the fees required in connection with the application, and be examined as required by section 6 of this act.
No such license shall be required for any person who installs, constructs, alters, services, repairs, tests, or maintains a chair lift device or stair lift device in a dwelling unit.