; and (C) to provide vouchers to such individuals in such populations. (2) Preservation of choice A recipient of a grant under this section may not restrict the ability of an individual receiving a voucher under this section to use the voucher to pay for authorized services furnished by any provider of authorized services, so long as the provider of such services meets all applicable State licensure or certification requirements regarding the provision of such services. (3) Duration of award With respect to a grant under this section, the period during which payments under such grant are made to the grant recipient may not exceed five years. (4) Matching funds The Secretary may require that recipients of grants under this section provide non-Federal matching funds, as determined appropriate by the Secretary, to ensure the commitment of the grant recipients to the provision of vouchers for treatment to individuals who use heroin, opioids, cocaine, methamphetamine, 3,4-methylene­dioxy­meth­am­phet­amine, or phen­cy­cli­dine. Such non-Federal matching funds may be provided directly or through donations from public or private entities and may be in cash or in-kind, fairly evaluated, including property, equipment, or services. (5) Maintenance of effort The Secretary may require that grant recipients under this section agree to maintain expenditures of non-Federal amounts for authorized services related to the treatment of heroin, opioids, cocaine, methamphetamine, 3,4-methylene­dioxy­meth­am­phet­amine, and phen­cy­cli­dine abuse at a level that is not less than the level of such expenditures maintained by the recipient for the fiscal year preceding the fiscal year for which the entity receives such a grant. (c) Report (1) In general Not later than December 1, 2019, and annually thereafter, the Secretary shall submit a report to the Congress on the grants under subsection (a). (2) Contents of report The report under paragraph (1) shall contain an evaluation of the effectiveness of the grants made under subsection (a)