; or (ii) any refusal by such authorized representative to ensure that remedial actions are taken with respect to any alleged violation. (H) Written statement The Secretary concerned shall give a person that submits a request under subparagraph (A) a written statement of the reasons for the final disposition of the request. (b) Monitoring (1) Monitoring system (A) In general The Secretary concerned shall require all operators to develop and maintain a monitoring and evaluation system that shall identify compliance with all requirements of a permit issued under this Act. (B) Additional monitoring The Secretary concerned may require an operator to conduct additional monitoring as necessary to ensure compliance with the reclamation and other environmental standards of this Act. Such monitoring and evaluation system described in subparagraph (A) and any additional monitoring required by this subparagraph is subject to the approval of the Secretary. (2) Reporting requirements (A) In general An operator shall file reports with the Secretary concerned, on a frequency and containing such information as determined by the Secretary concerned, regarding the results of the monitoring and evaluation system, except that if the monitoring and evaluation system shows a violation of the requirements of a permit issued under this Act, the operator shall immediately report such violation to the Secretary concerned. (B) Enforcement The Secretary concerned shall evaluate the reports submitted pursuant to this paragraph, and, based on such reports and any necessary inspection, shall take enforcement action pursuant to section 506. (C) Maintenance of reports