If any taxicab service permitted under this chapter is for any reason discontinued for a period of forty-five days, without the prior permission of the chief, the certificate of operation granted therefor shall be automatically canceled and shall be restored only in accordance with the provisions of this chapter.

    Any owner who shall retire and not replace any taxicab for a period of forty-five days shall immediately surrender to the chief of police the certificate granted for such taxicab. (Ord. 512 § 10, 1994: prior code § 10-71)