Naved took 50 wickets for Sussex last season

Pakistan bowler Rana Naved-ul-Hasan has until Friday to decide whether his future lies with Yorkshire or the rebel Indian Cricket League (ICL).

The seamer, 30, is among a group of overseas players signed up to the rebel league, but Naved faces an England-wide ban because of his ICL contract.

The ICL has not been recognised by the International Cricket Council.

"He has effectively got the rest of the working week," said Tykes chief executive Stewart Regan.

The English Cricket Board (ECB) has brought its stance into line with other national bodies by banning ICL players from their domestic leagues.

Hampshire-bound fast bowler Shane Bond and Sussex leg-spinner Mushtaq Ahmed could also jeopardise their involvement in the forthcoming county season because of their commitment to the ICL's unofficial Twenty20 Cup.

No member or venue receiving any funding from the ECB will be allowed to host such events ECB statement

The ECB said it was their "policy to condemn unauthorised events" and is "determined to disassociate and distance itself from any promoter, agent or individual involved in such events".

The ECB issued its statement after digesting a report it had commissioned "on the impact and threat of unauthorised events to the infrastructure of the sport".

In February Yorkshire announced South African paceman Morne Morkel would act as cover for Naved during part of the 2008 season due to the Pakistan bowler's shoulder injury.

The appearance of non-sanctioned tournaments has caused ructions around the world, with Bond having his contract with New Zealand Cricket terminated because of his decision to sign for the ICL.

Shane Bond's involvement signalled the end of his Test career

The ICL is in opposition to the sanctioned Indian Premier League (IPL), which has also proved a major draw to high-profile players from across the world.

Imran Farhat, Taufeeq Umar and Shabbir Ahmed have been banned by the Pakistan authorities from playing in the country's domestic competition after signing up with the ICL.

The continued growth of Twenty20 worldwide has led to the possibility of increasing numbers of events falling outside the control of governing bodies and potentially harming the established domestic and international game.

England internationals Chris Read, Vikram Solanki and Paul Nixon took part in the inaugural ICL at the end of 2007.

The ECB restated that players choosing to do so in the future may harm their prospects in England.

"This policy clearly demonstrates a preference towards players and officials who do not participate in unofficial events," said the ECB.

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It sent out an even stronger warning to any club which might consider providing a venue or any other assistance to unofficial events.

"No member, or venue, receiving any funding from the ECB, will be allowed to host such events," it said.

"Unqualified cricketers requiring a 'no objection certificate' to be registered for cricket in England and Wales are unlikely to receive such certificates from their home boards if they participate in unauthorised events," added the ECB.

The ECB said it was taking its stance "to protect the genuine interests in the development of grassroots and county cricket" and to assist in the fight against doping and corruption.

The board is to recommend that counties enter into 12-month agreements with their players in order to give them greater control over where they ply their trade.

The ECB added that county clubs "recognised the potential threat to the county game by unauthorised cricket and offered their support to the actions proposed by the ECB".