Past-due benefits deposited by SSA, and subsequent past-due benefits as described
                  in B.3. above, are excluded from resources and any accrued interest is excluded from
                  income and resources. No other funds may be deposited in the account. For any month
                  that funds other than authorized past-due benefits and accrued interest are commingled
                  in the account as of the first moment-of-the-month, none of the funds are excluded
                  from resources in that month.
               
               EXCEPTION: Funds, other than past-due benefits, required by a financial institution to open the
                  dedicated account may be commingled in the account, but only until the end of the
                  month following the month that the past-due benefits are direct deposited into the
                  account. The funds required to open the account are not excluded from resources. (See
                  SI 01130.601C.)