A sometimes controversial rule is usually referred to as "the ground cannot cause a fumble".

The tribunal nullified a controversial rule established by the International Olympic Committee.

The men in black will be under extreme pressure because of a controversial new rule that any player who tackles from behind must be sent off.

The qualification rounds for the four previous World Cups were very confusing, with controversial rules and many withdrawals.

These murals were not as a rule abstract or terribly controversial in theme: this was, after all, public art paid for with taxpayers' money.

He held up the meet for 20 minutes, lying on the track after being disqualified for violating a controversial new false-start rule.

But maybe you could call it a controversial rule.

Nieves, hesitant at first and not knowing what to do, had exploited the controversial new rule in college football this season.

This is one of the more controversial rules of Big 2 (var.

Community assembly rules are a set of controversial rules in ecology, first proposed by Jared Diamond.