Yes*.
However…
That is if your REG credit truly does expire 9/30. Some states I have heard of list the end of the window, but really have it expire 18 months from the date it was taken. So, say 18 months is 9/3. But, since they don't know your exact dates from NASBA till after you finish all 4 and they get details, they just tell you 9/30 on all your paperwork. So, you trust your paperwork, follow 9/30, take your exam 9/8, and then when they get all your 4 passing scores, they tell you nope, it was 9/3. I've seen some people on here in such states successfully fight it and get the scores to count, but it's a several-month process to fight it, during which time you risk other scores expiring. So, you'll want to at least share your state and see if someone can confirm for your state specifically, or contact your state board to confirm (I know, that's what's said in almost every thread on here, sorry to say it again!), or even better look back and see what date you took the exam originally to see if 9/30 is 18 months exactly and if not then confirm for certain with your state board.
* The asterisk above is because I think I saw someone on here post once from a state that was the very very rare exception of going based off of the dates the scores were received, rather than the dates the exams were taken. So, for their state, you had to receive your final passing score before the expiration date, rather than take the final exam before the expiration date. I don't remember which state they were in, but if you're in that same state, then 9/8 would only work if the score release for 9/8 is prior to 9/30. So…again, it's somewhat state-specific, will want to confirm for your specific state, whether there's someone on here that knows for your state for certain or if your state board can confirm for certain.