SEC. 414. ENFORCEMENT.
  It shall be  unlawful for any person  subject to this  title to
violate  any   prohibition  of,  requirement  of,  or  regulation
promulgated pursuant to this  title shall be a violation  of this
Act.  In  addition to  the  other  requirements and  prohibitions
provided for in this title, the operation of any affected unit to
emit  sulfur dioxide in excess  of allowances held  for such unit
shall  be deemed a violation, with each  ton emitted in excess of
allowances held constituting a separate violation.
[42 U.S.C. 7651m]