The department may grant an extension of the applicable compliance timetables if failure to comply with the permit, rules, or the act resulted from circumstances clearly beyond the control of the miner or permit holder. The extension may be granted for up to eighteen months. However, the extension may be revoked if the miner or permit holder is not, in the opinion of the department, making every reasonable effort to comply.

Additional performance security in a form acceptable to the department may be required if it is determined to be necessary to assure that the deficiencies are rectified.