Part D Payments, Limits and Eligibility Requirements that Change Based on Other Indicators - Chart: Part D includes numerous dollar thresholds and co-payment requirements that increase yearly, based on the CPI and other indicators. This chart shows 2006 and 2007 amounts and relevant indices for: (1) regular and low-income subsidy (LIS) cost-sharing (deductibles, initial coverage limits, TrOOP, and co-pays); (2) LIS income and resource requirements; and (3) amount in controversy thresholds for appeals. (June 5, 2006)