Driver Change/ Additional Driver Registration

to simplify, there are two important dates you need to be concerned with.  The 1st is the one you have been notified of where your fees need to be paid up and your status says "Ready to Race" (assuming you have 4 drivers set).  The 2nd date is when the roster is locked.  That date is usually 10-14 days before the actual race.  Pay your fees in full now.  Have all your bodies organized 2 weeks before the race.  If you need to add a body beyond what you have already paid, you need to pay the extra driver fees when you add them.  If you miss the 1st date deadline, they can boot your entry.  If you miss the 2nd one, it costs you money.  They made the penalty high enough that there is pain involved so don't miss either deadline.