; (II) the Federal medical assistance percentage applicable under subsection (y); (III) the Federal medical assistance percentage applicable under subsection (z)(2); or (IV) the Federal medical assistance percentage determined for the State and quarter under subsection (ff). (ii) Look-back period The term look-back period means, with respect to a State and a fiscal quarter that is an economic downturn quarter for the State, the period of 4 fiscal quarters that ends with the fourth quarter which precedes the most recent fiscal quarters that was not an economic downturn quarter for the State. (6) Requirement for all States A State may not receive an increase in the Federal medical assistance percentage for such State under this subsection, with respect to a fiscal quarter, if— (A) eligibility standards, methodologies, or procedures under the State plan or a waiver of such plan are more restrictive during such quarter than the eligibility standards, methodologies, or procedures, respectively, under such plan (or waiver) as in effect on the last day of the most recent fiscal quarter that was not an economic downturn quarter for the State; (B) the amount of any premium imposed by the State pursuant to section 1916 or 1916A during such quarter, with respect to an individual enrolled under such plan (or waiver), exceeds the amount of such premium as of the date described in subparagraph (A)