; and (C) does not include a product that is— (i) approved by the Food and Drug Administration for— (I) sale as a tobacco cessation product; or (II) any other therapeutic purpose; and (ii) marketed and sold solely for a purpose described in clause (i). ; and (2) in section 2A(b)(1) ( 15 U.S.C. 376a(b)(1) ), by inserting NICOTINE/ after CIGARETTES/ . (b) Effective date This section, and the amendments made by this section, shall take effect on the date that is 90 days after the date of enactment of this Act. 3. Nonmailability of electronic nicotine delivery systems (a) Regulations Not later than 120 days after the date of enactment of this Act, the United States Postal Service shall promulgate regulations to clarify the applicability of the prohibition on mailing of cigarettes under section 1716E of title 18, United States Code, to electronic nicotine delivery systems, in accordance with the amendment to the definition of cigarette made by section 2. (b) Effective date The prohibition on mailing of cigarettes under section 1716E of title 18, United States Code, shall apply to electronic nicotine delivery systems on and after the date on which the United States Postal Service promulgates regulations under subsection (a) of this section.