(A) Notice regarding sidewalk repairs, sewer or water connections, dangerous structures, abating nuisances, or any other act, the expense of which, if performed by the city, may be assessed against the premises under the provisions of this code, shall be served:
(1) By delivering the notice to the owner personally or by leaving the same at his or her residence, office, or place of business with some person of suitable age and discretion;
(2) By mailing the notice by certified or registered mail to the owner at his or her last known address; or
(3) If the owner is unknown, by posting the notice in some conspicuous place on the premises at least five days before the act or action concerning which the notice is given is required to occur.
(B) No person shall interfere with, obstruct, mutilate, conceal, or tear down any official notice or placard posted by any city officer, unless permission is given by the officer to remove the notice.
(1993 Code, § 10.24)