For purposes of the period in which the Department must issue a final decision in your appeal under § 4.906:

(a) Your appeal commences on the date ONRR receives your Notice of Appeal.

(b) Your appeal ends on the same day of the 33rd calendar month after your appeal commenced under paragraph (a) of this section, plus the number of days of any applicable time extensions under § 4.909 or 30 CFR 1290.109. If the 33rd calendar month after your appeal commenced does not have the same day of the month as the day of the month your appeal commenced, then the initial 33-month period ends on the last day of the 33rd calendar month.