hi,

If your NTS for reg is expiring and you have not taken an exam date, will mean that you have not failed the Reg exam. Which means you can repeat the same paper in that window since you have not appeared for the exam.  So my understanding is that you should be able to get a new NTS for Reg and take a date by Nov end and clear Reg.  Accordingly, you wont lose the credit for FAR. 

This is solely my understanding.  I am from the CA board but I have not come across you scenario or read any reliable source.  In any case, you should give a call to the state board for your clarification.