What is the validity of the NC-OBC Certificate?
you are required to produce certificates which are valid up to 31st March 2019.
A related paragraph from DTE website: The candidates belonging to SC, VJ/DT (NT (A), NT (B), NT(C), NT (D), OBC and SBC categories shall produce “Caste Validity Certificate” and ST category shall submit “Tribe Validity Certificate”. All Backward Class candidates excluding SC & ST shall produce Non-Creamy Layer certificate valid up to 31st March 2019. If such candidates fail to produce the Caste/Tribe validity and Non-Creamy Layer certificate at the time of verification at FC, then such candidates will be treated as GENERAL category candidates for CAP Admissions.