Sirimavo Bandaranaike
4 events, 1964 to 1976.
1964
Sirima-Shastri Pact on people of Indian origin in Ceylon
India and Ceylon agreed that 525,000 stateless people of Indian origin, mostly Tamil plantation workers, would be repatriated to India.

1974
Sirima-Gandhi Pact on stateless persons of Indian origin
India and Sri Lanka agreed on the future of the 150,000 persons of Indian origin whose status had been left open by the 1964 Sirima-Shastri Pact.

India recognises Sri Lankan sovereignty over Katchatheevu
Under the Indo-Sri Lankan Maritime Agreement, India accepted Katchatheevu island in the Palk Strait as Sri Lankan territory.

1976
India and Sri Lanka sign the 1976 maritime agreement
A further agreement on the maritime boundary restricted fishermen of each country from fishing in the other's exclusive economic zone.
