The sentence of imprisonment imposed on a person convicted of an offense under the Controlled Substances Act (21 U.S.C. 801 et seq.) or the Controlled Substances Import and Export Act (21 U.S.C. 951 et seq.), involving methamphetamine or any listed chemical that is defined in section 102(33) of the Controlled Substances Act (21 U.S.C. 802(33), 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.
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).