If the pro rata primary insurance amount (PIA) is equal to or higher than the applicable
regular minimum PIA, follow the rules in RS 00615.650.
If the pro rata PIA is lower than the applicable regular minimum PIA, the Totalization
minimum sole survivor rate is the larger of:
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•
the regular minimum sole survivor rate times the pro rata fraction, or
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•
the original benefit amount based on the pro rata PIA.