Underarm bowling is allowed if it has been agreed so by both teams, before the match.
The notorious underarm delivery that created, One of the most controversial moments in World Cricket history is still hard to revisit after more than three decades.
The controversial bowl triggered a Cold war between the two nations after the infamous day on February 1 when New Zealand needed six runs with one ball remaining to draw the match.
But Aussie skipper Greg Chappell instructed the bowler, who was his younger brother Trevor, to deliver the ball underarm in a bid to prevent batsman Brian McKechnie any chance of hitting a six.
