Interesting requirement! I suppose at least you can deliver your software
exactly as specified with the error in it.
I'd speak to whoever wrote the requirement and ask why jTDS is required. I can understand why you would use jTDS over the old MS SQL Server 2000 driver - it was bug ridden, largely unsupported (MS bough the code from someone else and had no legal rights to update it) and undistributable (for the same reason). But now of those issues exist with the newer driver.
Have you checked jTDS JIRA? They might have a patch.