This rule would implement a safety monitoring system and compliance initiative designed to evaluate the continuing safety fitness of all Mexico-domiciled carriers within 18 months after receiving a provisional Certificate of Registration or provisional authority to operate in the United States. It also would establish suspension and revocation procedures for provisional Certificates of Registration and operating authority, and incorporate criteria to be used by FMCSA in evaluating whether Mexico-domiciled carriers exercise basic safety management controls. The interim rule included requirements that were not proposed in the NPRM but which are necessary to comply with the FY 2002 DOT Appropriations Act. On January 16, 2003, the Ninth Circuit Court of Appeals remanded this rule, along with two other NAFTA-related rules, to the Agency, requiring a full environmental impact statement and an analysis required by the Clean Air Act. On June 7, 2004, the Supreme Court reversed the Ninth Circuit and remanded the case, holding that FMCSA is not required to prepare the environmental documents. FMCSA originally planned to publish a final rule by November 28, 2003.