(Amended by Ordinance Nos. 183348 and 184957, effective November 25, 2011.) After a sidewalk has been improved or constructed, either alone or in combination with a curb, the owner of land abutting the street area in which the sidewalk has been constructed shall be responsible for maintaining such sidewalk and curb in good repair. If the City Engineer finds that any such sidewalk or curb needs repair, he or she shall post a notice on the adjacent property headed “Notice to Repair Sidewalk” (or curb) which shall in legible characters direct the owner, agent, or occupant of the property immediately to repair the sidewalk or curb, or both in a good and substantial manner in accordance with the plans, specification and regulations of the City. The City Engineer shall send by mail a notice to repair the sidewalk or curb, or both, to the owner, if known, of such property, or to the agent (if known) of the owner, directed to the post office address of the owner or agent when known, or if the post office address is unknown, the notice shall be directed to the owner or agent at the address where the notice was posted. A mistake in the name of the owner or agent, or a name other than that of the true owner or agent of the property, or mistake in address shall not invalidate said notice, but in such case the posted notice shall be sufficient.