LUT for Companies Using EVC and Not DSC?

Hello

On most websites I read, for LUT, LLP, and Companies, DSC is mandatory. 

However, today, my CA was able to obtain an LUT for a Private Limited company using the EVC method of an Authorised Signatory without requiring DSC at all

I also received the LUT certificate. 

I wonder if the rules were changed or will this EVC based approach create problems for me in the future?