(a) Each Mexico-domiciled carrier subject to this subpart will remain in the safety monitoring system for at least 18 months from the date FMCSA issues its provisional Certificate of Registration or provisional operating authority, except as provided in paragraphs (c) and (d) of this section.

(b) If, at the end of this 18-month period, the carrier's most recent safety audit or safety rating was Satisfactory and no additional enforcement or safety improvement actions are pending under this subpart, the Mexico-domiciled carrier's provisional operating authority or provisional Certificate of Registration will become permanent.

(c) If, at the end of this 18-month period, the FMCSA has not been able to conduct a safety audit or compliance review, the carrier will remain in the safety monitoring system until a safety audit or compliance review is conducted. If the results of the safety audit or compliance review are satisfactory, the carrier's provisional operating authority or provisional Certificate of Registration will become permanent.

(d) If, at the end of this 18-month period, the carrier's provisional operating authority or provisional Certificate of Registration is suspended under §385.111(a) of this subpart, the carrier will remain in the safety monitoring system until the FMCSA either:   (1) Determines that the carrier has taken corrective action; or   (2) Completes measures to revoke the carrier's provisional operating authority or provisional Certificate of Registration under §385.111(c) of this subpart.