Melbourne master coach Craig Bellamy has called for the NRL to get even tougher on exotic betting markets following the Tim Simona saga.

Wests Tigers centre Simona will this week appear before the NRL at Rugby League Central to answer allegations he bet on NRL matches.

The 25-year-old is facing a possible life ban as the governing body last year moved to eradicate several exotic betting markets in a bid to eradicate the chance of results and game-play being manipulated.

However premiership-winning coach Bellamy said the NRL's crackdown didn't go far enough and would welcome even tighter restrictions.

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"It's a real good move and I'm a bit surprised that they took so long to do it," Bellamy said.

"They could probably go a little bit further too ... a few more restrictions on what you can and can't bet on.

"I'm not much of a punter. Some of those exotic bets are way over the top and can be manipulated way too easy."

Simona is facing allegations he bet on players he was marking to be first try scorer.

Brisbane coach Wayne Bennett denied the game's associations with bookmakers had become too great, saying players were well educated and it was up to them to make good decisions.

"Some people never learn their lessons," Bennett said.

"There will always be someone with an indiscretion.

"But the good thing to know as a fan is that the game is doing a lot of things about this stuff, it is not just being swept under the carpet."

Under the NRL's betting guidelines no player or official can bet on any matches.

The NRL in December told betting agencies to scrap a number of novelty markets including head-to-head player bets, most runs, most metres, most number of 40-20s and most tackles.

Betting on under-20s matches has also been banned.

Last month NRL boss Greenberg vowed to come down hard on anyone found in breach of the game's betting code.

Asked if he would hesitate to ban anyone for life, Greenberg said: "There are massive penalties in place for players that do the wrong thing and the integrity of the game is central to that.

"If and when we need to make some hard decisions, we'll make them."

- AAP