Proration applies when eligibility is reattained on a date other than the first day
                  of a month.
               
               When there is Optional State Supplement (OSS) involvement, proration applies to Federal
                  and OSS payments for the same number of benefit days.
               
               Proration does not apply when a recipient eligible for only a Federal payment (including
                  recipients who are eligible but due no payment) becomes eligible for an OSS payment.
               
               EXAMPLE: A recipient in a Title XIX institution who is paid only a Federal payment (or who
                  is eligible but receives no payment (E01) while in the institution) will not be subject
                  to proration of the Federal or OSS payment when they leave the institution regardless
                  of the day of the month.