(A)   There are hereby created the positions of Plumbing Inspector, Electrical Inspector and Heating, Ventilation and Air Conditioning (HVAC) Inspector, all of whom shall be appointed by the Building Commissioner, subject to the approval of the Board of Public Works and Safety.
   (B)   All inspectors shall be specialists in their respective fields with a minimum of ten years’ experience in the field.
   (C)   All inspectors shall be subordinate to the Building Commissioner and shall work under his or her supervision and be subject to his or her rules and regulations.
   (D)   Each inspector shall inspect the apparatus pertaining to his or her particular field of specialty in all buildings and structures being erected or altered, as frequently as may be necessary to ensure compliance with the Building Code.