hello,

The obc(NCL) certificate is valid for 0ne year.From issuing of certificate it is valid for 12  months so u can use it till jan 2022.Further more it is unvalid and you have to apply for a new one. this information is given by central government of india. so as your admission will be in april or may i think it is unvalid till then.

hope it is cleared.

thank you!!