How can the error message be revised when Requisition Fails Funds?

When the requisition is ready to be submitted, if the charge account does not have enough funds the preparer receives the message;

Error - Check Funds Failed - Contact Purchasing Administrator if Necessary.

The Purchasing Administrator has expressed a desire to be taken out of this loop, as the Purchasing Administrator simply forwards the requisition to the Budgeting Personnel.  Please advise if there is a way to revise the message to say,  "Error - Check Funds Failed - Contact Budgeting Office please."