; and (C) a specification of the circumstances under which such certifications are required to be updated or resubmitted. (2) Interim requirement Until the final rule issued under paragraph (1) takes effect, safety assessment letters shall be submitted to the National Highway Traffic Safety Administration as contemplated by the Federal Automated Vehicles Policy issued in September 2016, or any successor guidance issued on highly automated vehicles requiring a safety assessment letter. (3) Periodic review and updating Not later than 5 years after the date on which the final rule is issued under paragraph (1), and not less frequently than every 5 years thereafter, the Secretary shall— (A) review such rule; and (B) update such rule if the Secretary considers it necessary. (4) Rules of construction (A) No conditions on deployment Nothing in this subsection may be construed to limit or affect the Secretary’s authority under any other provision of law. The Secretary may not condition deployment or testing of highly automated vehicles on review of safety assessment certifications. (B) No new authorities No new authorities are granted to the Secretary under this section other than the promulgation of the rule pursuant to paragraph (1). (5) Review and research To accommodate the development and deployment of highly automated vehicles and to ensure the safety and security of highly automated vehicles and motor vehicles and others that will share the roads with highly automated vehicles, not later than 180 days after the date of the enactment of this section, the Secretary shall— (A) initiate or continue a review of the Federal motor vehicle safety standards in effect on such date of enactment