For each inspection certificate issued by the Department, the designated station shall pay the Commissioner the fee required under section 1230 of this title. All unused inspection certificates and number tabs shall be returned to the Department within two months of the certificate's expiration date. A designated inspection station shall receive a refund for each unused certificate returned during the two-month period. If the station's designation is revoked or suspended under section 1228 of this title, the station shall return all unused certificates to the Department and shall not receive a refund. (Added 1997, No. 155 (Adj. Sess.), § 66i, eff. Sept. 1, 1998.)