The International Cricket Council is stepping up its efforts to eradicate bowlers with suspect actions.
They already have a two-step procedure in place to deal with international bowlers reported by umpires.
But they are now putting the onus on the various national boards to identify and help youngsters whose actions may not be legal.
"Over the past two years, there has been a detailed review of this issue," said ICC chief Malcolm Speed.
"The ICC is working at both the international level through its reporting, reviewing and suspension procedures and at the domestic level where it is ensuring each country is developing an effective system to address any concerns before players emerge onto the international stage."
Speed's comments follow recent criticism from former Australian coach Bob Simpson, who believes the problem has reached "epidemic proportions".
Writing in an Indian magazine, Simpson said: "I have never seen so many bowlers infringe as they do today."
Speed said Simpson was entitled to his opinion, but fundamental changes had been made since he was a member of the ICC's Bowling Review Group.
Shabbir was reported during a one-day series in New Zealand
Pakistan's Shabbir Ahmed, Jermaine Lawson of the West Indies and Bangladesh's Sanwar Hossain are currently working with experts to re-model their actions.
And former South African coach Bob Woolmer and former Pakistan captain Waqar Younis are currently attending the Under-19 World Cup in Bangladesh to spot any potential problems among the next generation.
The ICC has also commissioned new research into spin bowling.
Speed said the aim was to ensure the ICC has a "clear, fact-based understanding of what actually takes place in a spinners' action, rather than rely solely on the naked eye or TV replays, which have proven to be deceptive".
Sri Lanka's Muttiah Muralitharan is the spin bowler whose action has come under the closest scrutiny over the years.
He was twice no-balled for throwing during games in Australia, but subsequently proved his bent elbow was due to a congenital deformity.
The subject of suspect actions will be discussed again at May's meeting of the ICC Cricket Committee-Playing, which is chaired by Indian Sunil Gavaskar.