; (B) another agent or employee of such institution is registered to conduct research with a controlled substance in the same schedule; (C) the researcher who is so registered— (i) informs the Attorney General of the name, position title, and employing institution of the agent or employee who is not separately registered; (ii) authorizes such agent or employee to perform research under the registered researcher’s registration; and (iii) affirms that all acts taken by such agent or employee involving controlled substances shall be attributable to the registered researcher, as if the researcher had directly committed such acts, for purposes of any proceeding under section 304(a) to suspend or revoke the registration of the registered researcher; and (D) the Attorney General does not, within 30 days of receiving the information, authorization, and affirmation described in subparagraph (C), refuse, for a reason listed in section 304(a), to allow such agent or employee to possess such substance without a separate registration. . (c) Single registration for related research sites Such section 302(e) of the Controlled Substances Act ( 21 U.S.C. 822(e) ) is amended by adding at the end the following: (4) (A) Notwithstanding paragraph (1), a person registered to conduct research with a controlled substance under section 303(f) may conduct such research at multiple sites under a single registration if— (i) such research occurs exclusively at sites which are all within the same city or county and are all under the control of the same institution, organization, or agency; and (ii) the researcher notifies the Attorney General, prior to commencing such research, of all sites where— (I) the research will be conducted; or (II) the controlled substance will be stored or administered. (B) A site described by subparagraph (A) shall be included in such registration only if the researcher has notified the Attorney General of such site— (i) in the application for such registration