Ca final examination under existing or revised scheme

I am final student registered under existing scheme, My final registration is going to finish/lapse as on 28th August 2017. and as per  ICAI any registration on or after 01st July 2017 will be under Revised scheme. If i renew/re-validate my registration for CA Final level, under which scheme would i be entitled to give my exams for final Existing or Revised. I want to continue under existing scheme.