((a)) ** Enhanced prison sentence** The sentence of imprisonment imposed on a person convicted of an offense under the Controlled Substances Act ( et seq.) or the Controlled Substances Import and Export Act ( et seq.), involving methamphetamine or any listed chemical that is defined in section 102(33) of the Controlled Substances Act (, shall, if the offense is committed under the circumstance described in subsection (b), be increased by a consecutive term of imprisonment of not more than 15 years.21 U.S.C. 80121 U.S.C. 95121 U.S.C. 802(33)1
((b)) ** Circumstances** For purposes of subsection (a), the circumstance described in this subsection is that the offense described in subsection (a) was committed by a person who—
((1)) was enrolled in, or who was acting on behalf of any person or entity enrolled in, any dedicated commuter lane, alternative or accelerated inspection system, or other facilitated entry program administered or approved by the Federal Government for use in entering the United States; and
((2)) committed the offense while entering the United States, using such lane, system, or program.
((c)) ** Permanent ineligibility** Any person whose term of imprisonment is increased under subsection (a) shall be permanently and irrevocably barred from being eligible for or using any lane, system, or program described in subsection (b)(1).