Hi dakshay,

As CET issued a document related to document verification.

It says we need to bring a signature from BEO/DDPI

But on 30th of may they released another brochure saying that students who have studied in CBSE board need not to get the signature from BEO/DDPI. So If you have done your minimum 7 years of education from CBSE you don't have to get signature from BEO, your principal's signature is pretty enough 

But you still have doubt you can check the new brochure released on CET website