(a) Except as provided otherwise by law, a person who has registered as a contractor under one name as required by this chapter may not act in the capacity of a contractor under any other name unless that name also is registered.

(b) All advertising, contracts, correspondence, cards, signs, posters, papers, and documents prepared by a contractor for the contracting business must show the contractor’s name, mailing address, and address of the contractor’s principal place of business. Advertising and contracts must also include the contractor’s registration number.

(c) Individual contractors and partners, associates, agents, salesmen, solicitors, officers, and employees of contractors shall use their true names and addresses and the true name of the contractor firm at all times while acting in the capacity of a contractor or performing related activities.