In a Non-Treasury Disbursing Office (NTDO) environment these balances had become so commonplace that practical corrective actions couldn't always take place.
Prior to a recent Treasury mandate, Agency payments (for both NTDOs and TDOs) were disbursed daily, and the details of those payments were reported to Treasury at the end of each month.
This requirement was compulsory for TDOs as well as NTDOs. A TAS is a code that imparts critical information about each transaction: agency identifier, fiscal year, main account, sub-account, etc.; in essence, it's a shortened line of accounting.