Hey nycsubwayfan thanks for the heads up on the conductor info. My apologies for posting that on this thread. Hey nycsubwayfan you seem educated on this kind of stuff.... I have an odd question. It's probably nothing. When you go on the mta employment website and click on the link that says my activities, it shows all the positions that you applied for with mta. If you click this job the bus operator one, a pop up message appears saying referral source and SubSource must be answered prior to submitting an application. (21250,4). Do you have any clue what that means?