(a) Any person who engages in a streetgang criminal drug conspiracy, as defined in this Section, is guilty of a Class X felony for which the offender shall be sentenced to a term of imprisonment as follows: (1) not less than 15 years and not more than 60 years for a violation of subsection (a) of Section 401; (2) not less than 10 years and not more than 30 years for a violation of subsection (c) of Section 401. For the purposes of this Section, a person engages in a streetgang criminal drug conspiracy when:
(i) he or she violates any of the provisions of subsection (a) or (c) of Section 401 of this Act or any provision of the Methamphetamine Control and Community Protection Act; and (ii) such violation is part of a conspiracy undertaken or carried out with 2 or more other persons; and (iii) such conspiracy is in furtherance of the activities of an organized gang as defined in the Illinois Streetgang Terrorism Omnibus Prevention Act; and (iv) he or she occupies a position of organizer, a supervising person, or any other position of management with those persons identified in clause (ii) of this subsection (a). The fine for a violation of this Section shall not be more than $500,000, and the offender shall be subject to the forfeitures prescribed in subsection (b).