When were fielding restrictions introduced into the rules of One-day cricket?

When were fielding restrictions introduced into the rules of One-day cricket?

In the early 1980’s, in a One day match between England and West Indies, the Windies needed 4 runs off the last ball. The England captain, Mike Brearley put all the fielders and the wicket keeper on the fence to prevent a boundary from being scored. Fielding restrictions were then introduced in the Benson & Hedges Cup in Australia and were adopted for all ODIs after the 1992 World Cup.