18 U.S.C. § 2426: Repeat offenders

(a) Maximum Term of Imprisonment.—The maximum term of imprisonment for a violation of this chapter after a prior sex offense conviction shall be 3 times the term of imprisonment otherwise provided by this chapter, unless section 3559(e) applies. (b) Definitions.—In this section—(1) the term “prior sex offense conviction” means a conviction for an offense—(A) under this chapter, chapter 109A, chapter 110, or section 1591; or (B) under State law or the Uniform Code of Military Justice for an offense consisting of conduct that would have been an offense under a chapter referred to in subparagraph (A) if the conduct had occurred within the special maritime and territorial jurisdiction of the United States; and (2) the term “State” means a State of the United States, the District of Columbia, and any commonwealth, territory, or possession of the United States.