; (F) creates requirements for covered rail carriers to test, inspect, and maintain any defect detector based on the evaluation completed pursuant to subsection (b)(1); and (G) establish appropriate thresholds for alerts and corresponding safety actions, to the extent necessary. (2) Updated standards The performance standards established pursuant to paragraph (1)(D) shall be updated not less frequently than once every 5 years. (e) Updates and approvals (1) Updates Each entity subject to the mandate in subsection (a) shall update the plans required under subsection (d)(1)— (A) to reflect material changes to its railcar defect detector network; or (B) to address changes made to the performance standards pursuant to subsection (d)(2). (2) Approvals To ensure safety, the Secretary shall promptly review each plan submitted pursuant to subsection (d)(1), including the sufficiency of the performance standards required under subsection (c)(1)(D), and approve or reject each plan and update that is required to be submitted under this section. (3) Reviews for compliance Not less frequently than biannually, the Secretary shall conduct reviews to ensure that railroad carriers are complying with the plans required under paragraph (1). (4) Public availability Not later than 60 days after receipt, the Secretary shall make available to the public on the website of the Department of Transportation any plan or update submitted pursuant to this section, but the Secretary shall redact— (A) proprietary information, as verified by the Secretary; and (B) security-sensitive information, including information described in section 1520.5(a) of title 49, Code of Federal Regulations (or successor regulation), as verified by the Secretary. (f) Enforcement The Secretary may assess a civil penalty under chapter 213 of this title for any violation pursuant to the rulemaking under subsection (a) for— (1) each accident or incident on a route where the railroad is noncompliant with the plan approved under subsection (e)(2)