The provisions of Chapter 160 of the City of Altoona, Code of Ordinances shall be applicable for any work performed in regards to electrical, plumbing, and mechanical systems. In cases where an owner-occupant of a single-family dwelling desires to install plumbing and plumbing fixtures, heating or comfort cooling equipment, wiring, electrical equipment, or perform any electrical work in said person’s single-family dwelling, said person may appear before the Building Official and show competency to do the specific work for which said person desires a permit. After such showing, said owner-occupant may obtain a permit by paying the proper fee, without having to meet the provisions of Chapter 160.