The SS Act has been amended at various times to increase benefit amounts and to permit
            entitlement to benefits for categories of individuals not eligible on the basis of
            previous provisions. Prior to the 1971 amendments, family maximums were not always
            increased by the same percentage as the PIAs. The result was that some family maximums
            remained the same after a conversion. Starting September 1952, whenever an amendment
            to the Act increased the PIA or allowed a new type of entitlement, saving clauses
            ensured a benefit increase in some cases and prevented a decrease in other cases.
         
         Benefit conversion saving clauses and special saving clauses that have been in general
            use are summarized in RS 00630.400.