The following are exemptions from certification:

A.    Any person holding a valid certification issued after July 1, 1978, by another county, city or town in the commonwealth in accordance with the provision of Section 15.1-11.4 of the Code of Virginia.

B.    Any person certified or licensed in his trade prior to July 1, 1978, in accordance with provisions made by any local governing body in the commonwealth.

C.    Any person who shall have paid for a local license to the city, town or county in which his principal office and branch offices may be located, and who is thereby exempt from obtaining a Front Royal business license under the provisions of Section 58-299 of the Code of Virginia.

D.    Any person holding a valid Class A contractor's license in the appropriate classification, as duly registered by the State Registration Board for Contractors, pursuant to Title 54, Chapter 7, of the Code of Virginia.

E.    Any person employed as a helper or laborer, as defined within this chapter.

F.    Any person issued a certificate of journeymanship after completing an apprenticeship program approved by the Virginia Apprenticeship Council.

G.    Any person doing work on his or her own property.