O'Kelly was made an International Arbiter in 1962 .
Was the chief arbiter of the world championship matches between Tigran Petrosian and Boris Spassky in 1966 and 1969 .
O'Kelly was made an International Arbiter in 1962 and was the chief arbiter of the world championship matches between Tigran Petrosian and Boris Spassky in 1966 and 1969 .