42 U.S. Code § 16911 - Relevant definitions, including Amie Zyla expansion of sex offender definition and expanded inclusion of child predators
The term “tier I sex offender” means a sex offender other than a tier II or tier III sex offender.
A foreign conviction is not a sex offense for the purposes of this subchapter if it was not obtained with sufficient safeguards for fundamental fairness and due process for the accused under guidelines or regulations established under section 16912 of this title.
An offense involving consensual sexual conduct is not a sex offense for the purposes of this subchapter if the victim was an adult, unless the adult was under the custodial authority of the offender at the time of the offense, or if the victim was at least 13 years old and the offender was not more than 4 years older than the victim.
The term “convicted” or a variant thereof, used with respect to a sex offense, includes adjudicated delinquent as a juvenile for that offense, but only if the offender is 14 years of age or older at the time of the offense and the offense adjudicated was comparable to or more severe than aggravated sexual abuse (as described in section 2241 of title 18), or was an attempt or conspiracy to commit such an offense.
The term “sex offender registry” means a registry of sex offenders, and a notification program, maintained by a jurisdiction.
The term “student” means an individual who enrolls in or attends an educational institution, including (whether public or private) a secondary school, trade or professional school, and institution of higher education.
The term “employee” includes an individual who is self-employed or works for any other entity, whether compensated or not.
The term “resides” means, with respect to an individual, the location of the individual’s home or other place where the individual habitually lives.
 So in original. The second closing parenthesis probably should follow “18”.
This subchapter, referred to in text, was in the original “this title”, meaning title I of Pub. L. 109–248, July 27, 2006, 120 Stat. 590, known as the Sex Offender Registration and Notification Act. For complete classification of title I to the Code, see Short Title note set out under section 16901 of this title and Tables.