This chapter does not apply to: An officer or employee of a unit of the United States, a state, or any county, municipal corporation, or other political subdivision of a state while performing a duty of the office or employment; A person who sells security systems at a retail establishment or by means of a catalog or brochure for future delivery, if the person does not: Enter the customer's premises or property, or Have access to circumventional information; A commercial property owner or the owner's authorized agent performing the routine operation, including the changing of the pass codes, of a security system that protects the premises of the owner's commercial property; or A builder of commercial or residential property while installing security systems in buildings under construction that have no current occupants. A subcontractor whose main business fits the definition of “providing security system services” shall be licensed. This chapter does not supersede any local law or ordinance in the State that establishes standards or qualifications for an electrician or for electrical work involved in the installation of a security system or a security alarm. This chapter supersedes any local law or ordinance in the State that requires registration, training, bonding, or insurance for security systems technicians or others who have access to circumventional information. However, it does not preempt local governments from licensing or regulating security system agencies or security system users. Currently Licensed Electricians. The licensing requirements of this chapter do not apply to a master electrician who: Currently is licensed in that occupation under State or local law; and Is acting only within the scope of that occupation. A master electrician may not: Personally provide security systems services unless the master electrician is registered as a security systems technician; or Obtain access to circumventional information unless the master electrician is registered as an individual with access to circumventional information. This chapter does not authorize an individual to perform electrical work that otherwise requires an electrician's license under any State or local ordinance.