21 U.S.C. § 850

Except as otherwise provided in this subchapter or section 242a(a) 1 See References in Text note below. of title 42, no limitation shall be placed on the information concerning the background, character, and conduct of a person convicted of an offense which a court of the United States may receive and consider for the purpose of imposing an appropriate sentence under this subchapter or subchapter II.