(a) A person may not engage or offer to engage in the business of erecting, constructing, installing, altering, servicing, repairing, or maintaining elevators or related conveyances covered by this article in this state, unless he or she has a license issued by the commissioner in accordance with this article.
(b) A person licensed under this article shall:
(1) Have in his or her possession a copy of the license issued pursuant to this article on any job on which he or she is performing elevator mechanic work; and