All foreign nationals entering India are required to possess a valid international travel document in the form of a national passport with a valid visa from an Indian Mission/Post or eVisa (Limited Categories) from the Bureau of Immigration, Ministry of Home Affairs.

For 25th ICID Congress & 74th IEC Meeting, Vizag, November 2023:

Ministry of Home Affairs (MHA) - Security Clearance
Ministry of Home Affairs (MHA) - No Objection (19 October 2023)
Ministry of External Affairs (MEA) - No Objection

Authorized Portal for Visa Application to India - https://indianvisaonline.gov.in/