TN 25 (11-96)
The available years from which the earnings to be used in computing a PIA are selected.
Initial computation - years after 1950 up to the year in which the first month of entitlement to benefits occurs (for a detailed explanation of DIB base years, see RS 00605.210).
Recomputations - year in which the first month of entitlement occurs and later years (see RS 00605.501).
Years after 1950 through the year of death.
Years wholly within a period of disability may or may not be used, depending on whether the period of disability is disregarded for computation purposes; i.e., a DIB freeze (exclusion) or DIB nonfreeze (nonexclusion) computation.
The base years having the highest indexed or unindexed earnings and equal in number to the elapsed years less drop-out years. Where the result is less than 2, it must be raised to 2.
In all retirement and survivors computations and computations for DIB entitlements before 07/80, the number of drop out years equals 5. For DIB entitlements after 06/80, see RS 00605.230 and RS 00605.235 to determine the number of drop out years.
The number of months in the computation years.