The PIA is determined on the basis of the earnings record after the posted and corrected
earnings up to the maximum creditable amounts listed in RS 01404.300 have been adjusted or “indexed” to reflect earlier earnings in terms of the current dollar value in the “indexing year”. Earnings in and after the indexing year are not indexed. (See RS 00615.302 for widow(er)'s indexing provision.) Earnings in or after the indexing year are used
as posted and, unlike earnings after indexing, are limited by the maximum creditable
amounts listed in RS 01404.300.