; and (ii) 3 times the maximum term of imprisonment authorized by section 401(b) for a first offense; (B) by at least 3 times any term of supervised release authorized by section 401(b) for a first offense; and (C) by a fine up to 3 times that authorized by section 401(b) in addition to any term of imprisonment authorized by this subsection. (2) Minimum sentence Except to the extent a greater minimum sentence is otherwise provided by section 401(b), a person sentenced under this subsection shall be sentenced to a term of imprisonment of not less than 3 years, except that penalties for third and subsequent convictions shall be governed by section 401(b)(1)(A). . (b) Clerical amendment The table of contents for the Controlled Substances Act ( 21 U.S.C. 801 et seq. ) is amended by adding after the item relating to section 423 the following: Sec. 424. Distribution through use of social media. .