; and (iii) the highest prevalence of opioid use disorder based on data provided by the Substance Abuse and Mental Health Services Administration for calendar years 2013 through 2017 as may be available. (C) Grant funds (i) In general The funds from a 5-year grant awarded under this paragraph shall be provided to each of the 5 selected States on an annual basis for each of fiscal years 2019 through 2023. (ii) Carry over (I) In general The funds awarded under clause (i) for a fiscal year shall remain available for the State to make subgrants under subsection (c) for such fiscal year, except a State may carry over (subject to subclause (II)) not more than 10 percent of such funds for the following fiscal year for such purpose. (II) Request A State may make a request to the Secretary to carry over more than 10 percent of the funds awarded under clause (i) for a fiscal year for the following fiscal year for such purpose, and the Secretary may grant such request as the Secretary determines appropriate. (III) Amount for following fiscal year Any amount carried over under this clause shall not impact the amount of the funds the Secretary awards the State for such following fiscal year. (iii) Return of funds Any funds awarded under clause (i) that are not expended during the fiscal year for which the funds are awarded and that are not carried over for the following fiscal year under clause (ii) shall be returned to the Secretary to carry out this section. Any funds returned to the Secretary after fiscal year 2023 shall be returned to the general fund of the Treasury. (2) 1-year grants (A) In general The Secretary shall, for each of fiscal years 2019 through 2023, award 1-year grants to States or Indian tribes under this paragraph that submit an application in accordance with paragraph (3). Such States or Indian tribes shall be selected for a grant under this paragraph based on criteria established by the Secretary. (B) Grant funds (i) In general The funds awarded through a grant under subparagraph (A) for a fiscal year