; (F) develop and provide respite care services for adoptive and legal guardian families; and (G) support research on, and development of, promising practices (as defined in section 471(e)(4)(C)(iii)) for post-adoption and post-legal guardianship mental health services. (2) Eligible entity defined (A) In general In this subsection, the term eligible entity means— (i) a State; (ii) a public organization or private nonprofit organization designated by a State to develop or direct the State-sponsored statewide post-adoption and post-legal guardianship mental health service program under a grant under this subsection; and (iii) a federally recognized Indian tribe or tribal organization (as defined in the Indian Self-Determination and Education Assistance Act) or an urban Indian organization (as defined in the Indian Health Care Improvement Act) that is actively involved in the development and continuation of a post-adoption and post-legal guardianship mental health service program. (B) Limitation In carrying out this subsection, the Secretary shall ensure that each State is awarded only 1 grant or cooperative agreement under this subsection. For purposes of the preceding sentence, a State shall be considered to have been awarded a grant or cooperative agreement if the eligible entity involved is the State or an entity designated by the State under subparagraph (A)(ii). Nothing in this subparagraph shall be construed to apply to entities described in subparagraph (A)(iii). (3) Preference In providing assistance under a grant or cooperative agreement under this subsection, the Secretary shall give preference to— (A) eligible entities that have demonstrated success in increasing the level of adoption and legal guardianship competency among mental health providers, adoption and legal guardianship lawyers, social workers, case workers, adoptive parents, and legal guardians