2017 OBC Non Creamy Layer Limit extends to 8 lacs

Sir, My father was appointed as clerk in bank at 21 year age with income 900/- and after completion of 40 years he promoted to class 2 post ( scale 2) / Assistant manager and now presently in 2017 august he is a branch manager in bank (SBI) / scale 3 with income 893000/- , but as per latest modification in creamy layer limit for obc is upto 8 lakh . So I want to know about first thing whether I am eligible for OBC Non Creamy certificate as per new rule or not ? Second things is, I have already filled application form in OBC category for various central and state government vacancies including PSU insurance companies and banks in that case I am still eligible for OBC reservation or not ? Third thing is , When will be this new rule applicable , after the end of 2017 ?. what if who already filled OBC in various vacancies and If they clear pre exam in obc cutoff not general and In main examination they clear with obc cutoff then what will happen in this case Is he disqualify from recruitment due to new rule or pass the exam.