; and (B) in section 577(b) ( 42 U.S.C. 13662(b) )— (i) in paragraph (2), by striking or at the end; (ii) in paragraph (3), by striking the period at the end and inserting ; or ; and (iii) by adding at the end the following: (4) has been issued a Federal certificate of rehabilitation under section 3609 of title 18, United States Code, in which case there shall be a presumption against the termination of tenancy or assistance. . (2) Denial of Federal benefits Section 421 of the Controlled Substances Act ( 21 U.S.C. 862 ) is amended— (A) in subsection (a)— (i) in paragraph (1)(C), by inserting , unless the individual has been issued a Federal certificate of rehabilitation under section 3609 of title 18, United States Code, in which case, at the discretion of the court, the individual may retain eligibility for any or all Federal benefits before the period at the end; and (ii) in paragraph (2)— (I) by inserting (A) before The benefits ; and (II) by adding at the end the following: (B) For purposes of subparagraph (A), any individual who is issued a Federal certificate of rehabilitation under section 3609 of title 18, United States Code, shall be presumed to be rehabilitated. ; (B) in subsection (b)(2)— (i) by inserting (A) before The penalties ; and (ii) by adding at the end the following: (B) For purposes of subparagraph (A), any individual who is issued a Federal certificate of rehabilitation under section 3609 of title 18, United States Code, shall be presumed to be rehabilitated.