It shall be the duty of the Building Official, appointed under provisions of the Development Services Director, to administer and enforce the provisions of this chapter and to make any required inspections or tests. For the purposes of this Residential Rental Code they may also be referred to as the Code Official. A person or persons may be appointed as assistants or agents of the Building Official as may be necessary to carry out the provisions of this chapter. For the purpose of making inspections, tests, or otherwise discharging their official duties, the Code Official or inspector shall have the right to enter at any time any building, site, or manhole upon notifying the company or individual owning or having charge or control of the same.