NSE has clarified that pursuant to SEBI Circular no. SEBI/HO/DDHS/CIR/P/2018/144 dated November 26, 2018, Large Entities are required to submit “Initial Disclosure” within 30 days from the beginning of the FY, disclose the fact that they are identified as a Large Companies, to the Stock Exchange, where its securities are listed. NSE has introduced NEAPS platform for Disclosure for Large Corporates
https://nseindia.com/content/equities/NSE_Circular_01042019.pdf