In disability freeze only cases, the NH's RR compensation after 1936 is considered
as wages under the SS Act to meet the 20/40 fully insured, or age 31 earnings requirement.
It is used for the freeze whether the NH has 120 or more months of RR service or effective
01/01/2002, if less than 120 RR service months but with at least 60 months of RR service
after December 31, 1995 or, whether RRB has used the RR compensation in computing
the NHs disability or retirement annuity.