A.All notices required herein shall be served as provided in Section 1-10.3 if this Article unless otherwise specified.

B.Where real property is involved, written notice shall be mailed to the property owner at the address as shown on the last equalized county assessment roll.

C.Where personal service or service by mail upon the property owner cannot be made despite a diligent effort, a copy of the order shall be conspicuously posted at the property that is the subject of the order.

D.The failure of any person to receive any notice required under this Article shall not affect the validity of any proceedings taken under this Article.