Under such system the Secretary shall provide for computation of a standard prospective payment amount (or amounts) as follows:
Such amount (or amounts) shall initially be based on the most current audited cost report data available to the Secretary and shall be computed in a manner so that the total amounts payable under the system for the 12-month period beginning on the date the Secretary implements the system shall be equal to the total amount that would have been made if the system had not been in effect and if
section 1395x(v)(1)(L)(ix) of this title had not been enacted.
For the 12-month period beginning after the period described in subclause (I), such amount (or amounts) shall be equal to the amount (or amounts) determined under subclause (I), updated under subparagraph (B).
Subject to clause (iii), for periods beginning after the period described in subclause (II), such amount (or amounts) shall be equal to the amount (or amounts) that would have been determined under subclause (I) that would have been made for fiscal year 2001 if the system had not been in effect and if
section 1395x(v)(1)(L)(ix) of this title had not been enacted but if the reduction in limits described in clause (ii) had been in effect, updated under subparagraph (B).