; (B) follow-up services to prevent an individual from relapsing into such abuse; (C) wrap-around services, as such term is defined in section 514E(e)(4); and (D) any additional services specified by the Secretary. (2) Underserved population The term underserved population means a population of individuals who cannot access appropriate substance abuse treatment (including comprehensive substance abuse treatment) due to financial, geographical, language, socioeconomic, or cultural barriers. (e) Authorization of appropriations There are authorized to be appropriated such sums as may be necessary to carry out this section for fiscal years 2019 through 2023. 514E. Comprehensive wrap-around heroin, opioids, cocaine, methamphetamine, 3,4-methylene­dioxy­meth­am­phet­amine (ecstasy), and phen­cy­cli­dine (PCP) treatment services (a) In general The Secretary may make grants to public, private, and nonprofit entities, Indian tribes, and tribal organizations to establish programs to provide for and coordinate the provision of wrap-around services to heroin, opioids, cocaine, methamphetamine, 3,4-methylene­dioxy­meth­am­phet­amine, or phen­cy­cli­dine-affected individuals. (b) Minimum qualifications for receipt of award To seek a grant under subsection (a) , a public, private, or nonprofit entity, an Indian tribe, or a tribal organization shall submit an application to the Secretary at such time, in such manner, and containing such information and assurances as the Secretary may require, including assurances to the satisfaction of the Secretary that— (1) the applicant has the capacity to carry out a program described in subsection (a) ; (2) the applicant has entered into agreements with entities in the community involved, through which the applicant will provide wrap-around services