; or (B) is otherwise expressly listed in a schedule other than this schedule. (4) (A) The Attorney General may by order publish in the Federal Register a list of substances that satisfy the definition of the term fentanyl-related substance in paragraph (2). (B) The absence of a substance from a list published under subparagraph (A) does not negate the control status of the substance under this schedule if the substance satisfies the definition of the term fentanyl-related substance in paragraph (2). . 3. Registration requirements related to research (a) Alternative registration process for schedule I research Section 303 of the Controlled Substances Act ( 21 U.S.C. 823 ) is amended— (1) by redesignating the second subsection (l) (relating to required training for prescribers) as subsection (m); and (2) by adding at the end the following: (n) Special provisions for practitioners conducting certain research with schedule I controlled substances (1) In general Notwithstanding subsection (f), a practitioner may conduct research described in paragraph (2) of this subsection with 1 or more schedule I substances in accordance with subparagraph (A) or (B) of paragraph (3) of this subsection. (2) Research subject to expedited procedures Research described in this paragraph is research that— (A) is with respect to a drug that is the subject of an investigational use exemption under section 505(i) of the Federal Food, Drug, and Cosmetic Act ( 21 U.S.C. 355(i) ); or (B) is— (i) conducted by the Department of Health and Human Services or the Department of Veterans Affairs