The notice required by Sec. 580.3 of this part shall:
(a) Set forth the determination of the Administrator as to the
amount of the penalty and the reason or reasons therefor;
(b) Set forth the right to take exception to the assessment of
penalties and set forth the right to request a hearing on such
determination;
(c) Inform any affected person or persons that in the absence of a
timely exception to a determination of penalty and a request for a
hearing received within 15 days of the date of receipt of the notice,
the determination of the Administrator shall become final and
unappealable; and
(d) Set forth the time and method for taking exception to the
determination and requesting a hearing, and the procedures relating
thereto, as set forth in Sec. 580.6 of this part.