; and (B) may also consider factors specified in paragraphs (4), (5), and (7) of subsection (c) if the Secretary finds that reliable evidence exists with respect to such factors. (5) Nothing in this subsection shall preclude the Attorney General from transferring a substance listed in schedule I to another schedule, or removing such substance entirely from the schedules, pursuant to other provisions of this section or section 202. (6) A substance removed from schedule I(e) pursuant to paragraph (1) or (3) may, at any time, be controlled pursuant to the other provisions of this section or section 202 without regard to that removal. . 4. Clarification of certain registration requirements related to research (a) Exception for agents or employees of registered researchers Section 302(c)(1) of the Controlled Substances Act ( 21 U.S.C. 822(c)(1) ) is amended by striking or dispenser and inserting dispenser, or researcher . (b) Conforming amendment Section 102(3) of the Controlled Substances Act ( 21 U.S.C. 802(3) ) is amended by striking or dispenser and inserting dispenser, or researcher . (c) Single registration for contiguous research sites Section 302(e) of the Controlled Substances Act ( 21 U.S.C. 822(e) ) is amended by adding at the end the following new paragraph: (3) Notwithstanding paragraph (1), a person registered to conduct research with a controlled substance under section 303(f) may conduct such research under a single registration if such research occurs exclusively on a single, contiguous campus and the registrant notifies the Attorney General in writing of all sites on the campus where the research will be conducted or where the controlled substance will be stored or administered. If the registrant seeks to conduct such research at additional sites, the registrant shall submit a new notification before conducting such research at any such additional sites. . (d) New inspection not required in certain situations Section 303(f) of the Controlled Substances Act ( 21 U.S.C. 823(f) ) is amended— (1) by