The city official in charge of sidewalks may require sidewalks of the city to be repaired. Notice to the owners of property upon which such sidewalks in disrepair are located shall require within 48 hours from issuance of notice said owners to make arrangements to have the sidewalks repaired. Said repairs shall be completed within 21 days after issuance of said notice. No special assessment shall be levied against the property unless said owner shall neglect or refuse to repair within the time prescribed and in the event that such owner fails to repair, the city shall cause the repairs to be made and assess the property owner the expense of such repairs. In the event the property owner is a non-resident of the county in which the property lies, the city shall, before levying any special assessment against the property, send a copy of any notice required by law to be published by means of certified mail, return receipt requested to the last known address of the non-resident property owner. The last known address shall be that address listed on the current tax rolls at the time such required notice was first published.