Maryland Business Occupations and Professions Section 6-303
§ 6-303.
  (a)   This subtitle does not require an individual to hold a State license while the individual provides electrical services as an employee or subordinate of a master electrician licensed by the State Board if:
    (1)   the individual provides electrical services while under the control and supervision of the licensee; and
    (2)   the licensee is responsible for the electrical services that the individual provides.
  (b)   This subtitle does not require:
    (1)   a public utility company to employ a master electrician to represent the company while the company is engaging in the business of providing electrical services to a facility of the company that:
      (i)   is regulated by the Public Service Commission; and
      (ii)   is located on any premises, roadway, or right-of-way in which the company has a lawful interest; or
    (2)   an employee of a public utility company to hold a State license while the employee provides electrical services to a facility of the company that:
      (i)   is regulated by the Public Service Commission; and
      (ii)   is located on any premises, roadway, or right-of-way in which the company has a lawful interest.