1.__Engaging in business or trade.__A person may not engage in the business or trade of work regulated or controlled by this chapter without an appropriate certification and, if applicable, an endorsement issued pursuant to this chapter authorizing the person to engage in the specific business or trade or by any rule adopted pursuant to this chapter.

2.__Solicitation.__A person may not solicit, by sign, listing or any other form of advertisement, work regulated or controlled by this chapter or by any rule adopted pursuant to this chapter unless the person has been duly certified by the board to perform that work.

3.__Inspectors.__A municipality, county or agency of this State may not appoint, authorize, or employ any person to perform inspections under this chapter or the State Medical Gas and Vacuum System Code unless the inspector has been duly certified by the board as an inspector as provided in this chapter.

4.__Exceptions for apprentices.__Notwithstanding the provisions of this section, an apprentice permit holder enrolled in a registered apprenticeship program for a trade subject to control or regulation under this chapter may engage in the work of that trade only when the apprentice is under the supervision of a certified journeyman and only to the extent that the supervising journeyman is duly certified by the board to perform such work.

5.__Other exceptions.__This chapter may not be construed to require employees of the Federal Government to hold certifications required by this chapter.

Any violation of this section is subject to the penalties described in section 15372.

§15368.__Maintain current qualifications

A person who holds a certification or endorsement regulated by this chapter that requires at the time of application evidence of a certification pursuant to section 15362, subsection 2 must maintain those qualifications as a condition for maintaining certifications and endorsements issued under this chapter.

A person who does not maintain current certification requirements pursuant to section 15362, subsection 2 is guilty of a violation of this chapter, which immediately invalidates any certification or endorsement issued pursuant to this chapter.