If the person charged with violations does not, within 15 days after
receipt of the notice, take exception to the determination that the
violation or violations for which the penalty is imposed occurred, the
administrative determination by the Administrator of the amount of such
penalty shall be deemed final and not subject to administrative or
judicial review. Upon the determination becoming final in such a manner,
collection and recovery of the penalty shall be instituted pursuant to
Sec. 580.18.
[69 FR 75405, Dec. 16, 2004]