; and (2) by adding at the end the following new subsection: (nn) Juvenile; eligible juvenile; public institution For purposes of subsection (a)(84) and this subsection: (1) Juvenile The term juvenile means an individual who is— (A) under 21 years of age; or (B) described in subsection (a)(10)(A)(i)(IX). (2) Eligible juvenile The term eligible juvenile means a juvenile who is an inmate of a public institution and who— (A) was determined eligible for medical assistance under the State plan immediately before becoming an inmate of such a public institution