The rules in that link-current or outdated?
Refer to question of Formation Flights
well how can you say this rule is outdated
and in question they only mentioned aircrafts and not the type of aircrafts
and the rule which you are stating is for only civil aircrafts
and in flight plan filling form still the provision is given for formation flight entry
so we can still have formation flight in india
if there would be no provisions then there would have been a rule for that stating not only civil but all aircrafts are not authorised for formation flight
but such a rule doesnt exists