(a) Except as provided in subsection (b):

(1) Any person engaged in plumbing work in this state shall be required to submit evidence of qualification to engage in plumbing and shall be licensed as provided in this part;

(2) It is unlawful for any person to engage in or offer to engage in plumbing work in this state unless the person has been duly licensed under this part or licensed in a municipality or county that issues licenses to persons to perform plumbing work only in that municipality or county; and

(3) Any person engaged in plumbing work, including a person who engages in plumbing work on residential construction on private property for the purpose of resale, lease, rent or any other similar purpose, shall be required to submit evidence of qualification to engage in plumbing work and shall be licensed.

(b)

(1) A person who does not have a license is authorized to engage in plumbing work only if employed by a licensed plumber, a licensed plumbing contractor or any other entity approved by the board.

(2) Any single residence homeowner is exempt from the limited licensed plumbing requirements of this part for purposes of performing plumbing work on the homeowner's own residence.

(3) Any person who holds a license issued by the commissioner of commerce and insurance as either a manufactured home installer or a manufactured home retailer pursuant to § 68-126-404 does not have to obtain a separate license as a limited licensed plumber in order to perform plumbing work on a manufactured home as defined in § 68-126-202; provided, that the work is related to the set-up, as defined by § 68-126-402, of a manufactured home or performed in connection with a manufacturer's warranty covering a manufactured home.

(4) Any person who holds a license issued by the commissioner of commerce and insurance as a manufactured home manufacturer pursuant to § 68-126-206 does not have to obtain a separate license as a limited licensed plumber in order to perform plumbing work on a manufactured home as defined in § 68-126-202; provided, that the work is related to the construction of a manufactured home or performed in connection with a manufacturer's warranty covering a manufactured home.

(5) Any person who holds a license issued by the commissioner of commerce and insurance to manufacture or install modular building units pursuant to § 68-126-305 does not have to obtain a separate license as a limited licensed plumber to perform plumbing work on a modular building unit as defined in § 68-126-303; provided, that the work is related to the construction or installation of a modular building unit or performed in connection with a manufacturer's warranty covering a modular building unit.

(6) No person is required to obtain a license issued pursuant to this part to do general maintenance work within a residence.

(7) A dealer, as defined by and licensed pursuant to title 68, chapter 135, part 1, and its authorized officers and employees do not have to obtain a license as a limited licensed plumber to perform plumbing work related to the provision of liquefied petroleum gas to or within any residential or commercial building.

(8) An operator, as defined by 49 CFR 192.3, and its authorized officers and employees do not have to obtain a license as a limited licensed plumber to perform plumbing work related to the provision of natural or commingled gas or its applications to or within any residential, industrial or commercial building.