Whenever any motor vehicle or part thereof is in the custody of the department of police and whenever the owner or person entitled to the possession thereof cannot be located and fails to claim such motor vehicle or part thereof for a period of sixty (60) days after such motor vehicle, or part thereof, came into the custody of the division, the same may be disposed of by the county executive, at public sale, at some time and place which shall be convenient and accessible to the public, provided, that an advertisement of the time, place and terms of the sale, together with a full, detailed description of such motor vehicle, or part thereof, shall be inserted in at least one (1) newspaper of general circulation in the county, at least once each week for two (2) successive weeks prior to the sale; provided, further, that a notice by registered mail shall be sent at least ten (10) days prior to the sale to the owner and lien holder, if any, shown on the records of the commissioner of motor vehicles, or the person entitled to the possession of such motor vehicle or part thereof, if his address be known, or if it can be ascertained by the exercise of reasonable diligence. If such address cannot be ascertained then such notice shall not be required. (1978 L.M.C., ch. 7, § 2.)