1. Short title This Act may be cited as the Temporary Reauthorization and Study of the Emergency Scheduling of Fentanyl Analogues Act . 2. Extension of temporary order for fentanyl-related substances Notwithstanding any other provision of law, section 1308.11(h)(30) of title 21, Code of Federal Regulations, shall remain in effect until May 6, 2021. 3. Study and report on impacts of classwide scheduling (a) Definition In this section, the term fentanyl-related substance has the meaning given the term in section 1308.11(h)(30)(i) of title 21, Code of Federal Regulations. (b) GAO report The Comptroller General of the United States shall— (1) conduct a study of the classification of fentanyl-related substances as schedule I controlled substances under the Controlled Substances Act ( 21 U.S.C. 801 et seq.), research on fentanyl-related substances, and the importation of fentanyl-related substances into the United States; and (2) not later than 1 year after the date of enactment of this Act, submit a report on the results of the study conducted under paragraph (1) to— (A) the Committee on the Judiciary of the Senate; (B) the Committee on Health, Education, Labor, and Pensions of the Senate; (C) the Caucus on International Narcotics Control of the Senate; (D) the Committee on the Judiciary of the House of Representatives; and (E) the Committee on Energy and Commerce of the House of Representatives. (c) Requirements The Comptroller General, in conducting the study and developing the report required under subsection (b), shall— (1) evaluate class control of fentanyl-related substances, including— (A) the definition of the class of fentanyl-related substances in section 1308.11(h)(30)(i) of title 21, Code of Federal Regulations, including the process by which the definition was formulated; (B) the potential for classifying fentanyl-related substances with no, or low, abuse potential, or potential accepted medical use, as schedule I controlled substances when scheduled as a class