(a) If a railroad cannot initiate or complete remedial actions within 30 days after the end of the calendar month in which the notification is received, it shall—

1. (1) Prepare, in writing, an explanation of the reasons for such delay and a good faith estimate of the date by which it will complete the remedial actions, stating the name and job title of the preparer and including either:

   1. (i) A photocopy of both sides of the Form FRA F 6180.96 on which the railroad received notification; or

   2. (ii) The following information:

      1. (A) The inspection report number;
      2. (B) The inspection date; and
      3. (C) The item number; and
2. (2) Sign, date, and submit such written explanation and estimate, by first class mail, to the FRA Safety Inspector whose name and address appear on the notification, within 30 days after the end of the calendar month in which the notification is received.