; (2) a definition of due diligence; and (3) in the case of a registrant that dispels all of the indicators giving rise to a suspicious order or series of orders, the circumstances in which the registrant is not required to file the notification under such section 312(a)(4). (c) Penalty Section 402(a)(5) of the Controlled Substances Act ( 21 U.S.C. 842(a)(5) ) is amended by inserting before the semicolon at the end the following: , including any such violation of section 312(a)(4) . (d) Applicability Section 312(a)(4) of the Controlled Substances Act, as inserted by subsection (a), shall apply beginning on the day that is 1 year after the date of enactment of this Act. Until such day, section 312(a)(3) of the Controlled Substances Act shall apply as such section 312(a)(3) was in effect on the day before the date of enactment of this Act. (e) Sense of Congress It is the sense of Congress that— (1) medications for opioid use disorder significantly reduce the risk of overdose death; and (2) the requirements of this Act are not intended to impair access to controlled substances primarily used to treat opioid use disorder.