Upon the discovery of evidence of a violation of this chapter or of rat infestation of any building, the health officer shall give written notice to the owner or occupant of such building to take immediate measures to correct the violation and remove the infestation. Such notices shall specify that the work must be completed within the time specified in the notice, which shall in no event be less than fifteen (15) days from the date of the notice. It is unlawful for any person to fail to comply with the terms of such notice. (Prior code § 18-22-5)