8 USC Section 2423
Federal criminal law prohibits a wide range of activities relating to transporting people and/or traveling across state lines or internationally for the purpose of engaging in illegal sexual activity. Specifically, 18 U.S.C. § 2423 prohibits four types of activities and carries very severe penalties.
First, 18 U.S.C. § 2423 makes it a felony punishable by a minimum of 10 years in prison (and by as much as life in prison) to “knowingly transport an individual who has not attained the age of 18 years in interstate or foreign commerce… with intent that the individual engage in prostitution, or in any sexual activity for which any person can be charged with a criminal offense.” This provision obviously applies to those engaging in the human trafficking of underage prostitutes, and also potentially applies to an adult who drives or attempts to drive a minor across state lines so that he or she can have sex with that minor in another state. It could also apply to people who purchase bus or plane tickets for minors to travel into the U.S. or across state lines for the purpose of engaging in illegal sex.