About 5 years ago we set up LEDES1998B billing for one our our clients.  We now have another client that is requiring us to use task codes and an electronic delivery.  They will need us to use some of the L600 series task codes that were ratified into the UTBMS after we added our package of codes.

My question is this, can I just go into the Client Reference List and manually add these codes and have it work with the LEDES1998B electronic delivery without problems?