A person may engage in the business of providing plumbing services if: the person is a master plumber or holder of a limited master plumber license; or the person: designates a master plumber or holder of a limited master plumber license who actively directs, controls, and is responsible for all plumbing services; and otherwise provides the plumbing services in accordance with this title. A person may engage in the business of providing propane gas services if: the person is the holder of a propane gas fitter certificate; or the person: designates a holder of a propane gas fitter certificate who actively directs, controls, and is responsible for all propane gas services; and otherwise provides the propane gas services in accordance with this title. A person may engage in the business of providing natural gas services if: the person is the holder of a master natural gas fitters license; or the person: designates a holder of a master natural gas fitters license who actively directs, controls, and is responsible for all natural gas services; and otherwise provides natural gas services in accordance with this title.

A master plumber, holder of a limited master plumber license, or other person who engages in the business of providing plumbing services under this subtitle may employ an individual who is not a master plumber or holder of a limited master plumber license to provide or assist in providing plumbing services if the individual: is licensed: as an apprentice plumber, to assist in providing plumbing services; or as a journey plumber or holder of a limited journey plumber license, to provide plumbing services; and provides or assists in providing the services only within the scope of the license. This section does not apply to an individual performing work that is only incidental to the licensee providing or assisting in providing plumbing services.

Before a master plumber or holder of a limited master plumber license may provide plumbing services through a person who engages in the business of providing plumbing services under this subtitle, a holder of a propane gas fitter certificate may provide propane gas services through a person who engages in the business of providing propane gas services under this subtitle, or a master plumber or a holder of a master natural gas fitters license may provide natural gas services through a person who engages in the business of providing natural gas services under this subtitle, the master plumber, holder of a limited master plumber license, holder of a propane gas fitter certificate, or holder of a master natural gas fitters license shall submit to the Board a notice stating the intent of the master plumber, holder of a limited master plumber license, holder of a propane gas fitter certificate, or holder of a master natural gas fitters license to do so. The notice shall include: the name of the master plumber, holder of a limited master plumber license, holder of a propane gas fitter certificate, or holder of a master natural gas fitters license submitting the notice; a statement that the named individual has been designated as the master plumber, holder of a limited master plumber license, holder of a propane gas fitter certificate, or holder of a master natural gas fitters license of the person; the address of the principal place of business of the person; any trade or fictitious name that the person intends to use while conducting the business of the person; the name of the person who carries insurance as required under § 12-501 of this title; and any other information that the Board requires by regulation. The Board may set by regulation procedures for keeping current information about any person through whom plumbing services are provided.