It shall be the duty of the city to notify any owner, tenant or occupant of property herein described to remove or otherwise correct the objectional matter herein legislated against, which notice shall be sent by registered mail to the last known address of such owner, tenant or occupant, notifying him that he has a period of twenty four (24) hours from and receipt of such notice within which to correct or otherwise remove the objections set forth in said notice. (1961 Code)