Sussex want cricket authorities to tighten up the rules on illegal bowling actions.

Chairman Don Trangmar's call come as the county's vice-captain James Kirtley tries to clear his name after he was reported for a suspect action while making his England debut in November.

The 27-year-old subsequently underwent extensive scientific analysis and the ECB's bowling panel 'identified issues' which Kirtley has since begun working on under the guidance of the ECB's bowling advisor Bob Cottam and Sussex coach Peter Moores.

His action will be reassessed before the start of the season when an updated report will be sent to the ICC.

Trangmar believes Kirtley is a victim of the latest camera technology which can slow down the replay of a bowler's action to 250 frames per second.

He said: "The technology used to film bowlers is much better than even two years ago. There is definitely a problem relating to the capability and consistency of the equipment used. If the same cameras that filmed James at 250 frames per second were used all the time there would be a considerable number of bowlers whose actions would suddenly reveal flaws.

"James has an unusual action, but people make the leap from unusual to illegal very quickly and based on what they see with the naked eye which is wrong.

"In this whole matter it's unclear whether the ECB or ICC are working to any established technical criteria at all. The present throwing law was designed for the club cricketer.

"Until we have clearly defined rules to harness the new technology the whole thing will be a grey area."

Moores worked with Kirtley again last week and is confident he will emerge a better bowler over the next few weeks.

"Without getting too technical we're trying to line James up a bit better," said Moores. "Cosmetically and biomechanically his action will look better but at the same time we won't take away his gifts. It should help him get more bounce and lateral movement which is useful on flat wickets.

"Great bowlers like Dennis Lillee and Imran Khan adjusted their actions during their careers and got more efficient. We believe James will be better prepared for Test cricket by the end of it. What helps is that he is mentally strong and if you've got a powerful mind working for you it really helps as well."

Kirtley hopes to be cleared before Sussex's pre-season trip to Grenada in March although Trangmar is unclear as to the extent of ECB's powers should they still be unsatisfied. They cleared him after he was reported on an England A tour two years ago.

Trangmar added: "It would be morally and legally indefensible to make a judgement affecting someone's career based on no extablished criteria."