Whenever a notice is required to be given, or may be given, under any provision of this Code or any provision of any code adopted by reference by this Code or any provision of any ordinance or resolution of the City not included within this Code, such notice may be given as herein provided. Unless different or special provisions are otherwise specifically made in this Code or in some other applicable enactment, any such notice may be given either by personal delivery thereof to the person to be notified, or by deposit in the United States mail in a sealed envelope, postage prepaid, addressed to such person to be notified, at that person’s last known business address as the same appears in the public records or other records pertaining to the matters to which such notice is directed. Service by mail shall be deemed to have been completed at the time of deposit in the post office or in the official receptacle thereof.