Any building constructed, rebuilt, altered or located, on or after the effective date of this chapter, in violation of the restrictions and regulations established for the district in which it is located or in violation of other pertinent terms or provisions of this chapter shall be changed, altered, corrected or relocated by the person who constructed or located such building and by the owner of the land on which it is situated so that both building and premises shall conform with all provisions of this chapter. Such change, alteration, correction or relocation shall be made within 30 days after notification, in writing, by the Zoning Officer to the person who constructed, altered or located the building and the owner of the land on which it is located. Such notification can be made by first-class mail to the last known post office address of those to be served.