It is interesting that Indian passport holders are stated by GoI to be exempt from something they have been exempt from for many years anyway (filling out an arrival form).

PS The above GoI link provided by Oliver2002 says OCI holders are exempt. But it also provides a GoI link https://boi.gov.in/boi/ and that web site has a running "What;'s New" text strip (one line of text moves from right to left...don't know the right term for that), and that says OCI holders need to fill out the form.

And incidentally, OCI holders are foreigners, so it makes no sense to say that all foreign travelers must fill out the form and then say OCI holders are exempt, as stated on https://eoilima.gov.in/docs/e-Arrival%20Card.pdf