Certificates for the continued occupancy of non-conforming uses existing at the time of passage of this Ordinance or made non-conforming by this Ordinance shall state that the use is a non-conforming one and does not conform with the provisions of this Ordinance. The Zoning Administrator shall notify the owners of the property being used as a non-conforming use and shall furnish said owner with a Certificate of Occupancy for such non-conforming use, subject to the provisions of this Ordinance.