18 U.S. Code § 1591 - Sex trafficking of children or by force, fraud, or coercion
(a) Whoever knowingly—
(1) in or affecting interstate or foreign commerce, or within the special maritime and territorial jurisdiction of the United States, recruits, entices, harbors, transports, provides, obtains, advertises, maintains, patronizes, or solicits by any means a person; or
(2) benefits, financially or by receiving anything of value, from participation in a venture which has engaged in an act described in violation of paragraph (1),
knowing, or, except where the act constituting the violation of paragraph (1) is advertising, in reckless disregard of the fact, that means of force, threats of force, fraud, coercion described in subsection (e)(2), or any combination of such means will be used to cause the person to engage in a commercial sex act, or that the person has not attained the age of 18 years and will be caused to engage in a commercial sex act, shall be punished as provided in subsection (b).
(b) The punishment for an offense under subsection (a) is—
(1) if the offense was effected by means of force, threats of force, fraud, or coercion described in subsection (e)(2), or by any combination of such means, or if the person recruited, enticed, harbored, transported, provided, obtained, advertised, patronized, or solicited had not attained the age of 14 years at the time of such offense, by a fine under this title and imprisonment for any term of years not less than 15 or for life; or
(2) if the offense was not so effected, and the person recruited, enticed, harbored, transported, provided, obtained, advertised, patronized, or solicited had attained the age of 14 years but had not attained the age of 18 years at the time of such offense, by a fine under this title and imprisonment for not less than 10 years or for life.