Australian Nathan Brown became the third English Super League coach in two years to be fined for criticising match officials on Sunday.

The Huddersfield coach was handed a 1,000 pound ($A1,500) fine, half of it suspended for six months, after being found guilty of breaching the Rugby Football League's operational rules and the sport's Respect Policy.

The punishment follows comments made by Brown in the wake of the Giants' 38-6 win over Leeds at Headingley on April 15.

Brown told the post-match press conference that he would encourage his players to take the law into their own hands if Huddersfield's key playmakers were not better protected by referees.

Only last month Hull coach Richard Agar was fined 6,000 pounds ($A9,100), half of which was suspended, following his outspoken criticism of referee James Child after a match at the KC Stadium on April 1, which his side lost 20-18.

Two years ago Hull KR coach Justin Morgan was fined 4,000 pounds ($A6,1000), half of it suspended, for his scathing criticism of referee Ben Thaler.

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