Ca final examination due after 2.5 years or 3 years?

But I have not registered yet for CA-Final.I will do it after 01st july 2017.

Still Am I eligible for May 2019 examination.

Because as per the revised scheme it has been there that after completion of practical training you are eligible for CA Final exams.

Please,clarify my doubt.

I had passed my IPCC in may2017 both groups then when to register for ca final ?????

Sir/Mam 

My articleship commencement date is 27/04/2017 & Passed both Groups in Feb 2017 My doubt is that , is my attempt  due after 2.5 years i.e Immediate attempt Nov 2019 'or' next May 2020 

* This Doubt arises because certificate of service is required to upload while filling exam form ,in this stated that 3/3.5 years should be completed upto 31/10/2019 including Leaves