Yorkshire are hoping to have Australia fast bowler Mitchell Starc available early next month.
The club expect Starc to arrive in time to play in their LV= County Championship match against Gloucestershire at Bristol on May 9.
The 22-year-old left-arm seamer stepped in for the injured Peter Siddle in Australia's Test victory over the West Indies in Dominica last week. It was his fourth Test cap.
A club statement read: "Assuming that the required paperwork is obtained, Starc will fly from Sydney on May 4 and be available for selection for the LV= County Championship match against Gloucestershire at Bristol on May 9.
"Yorkshire will need a non-objection certificate (NOC) from the Australian cricket board and to tie up the required work permits to add the Aussie to their 2012 squad."
Yorkshire made it clear from the outset of this season that, after learning Australian batsman Phil Jaques would be able to play for them on a domestic contract, they would be targeting a pace bowler instead as an overseas signing.
Starc, who has also played in seven one-day internationals, appears to fit the bill for Yorkshire's director of cricket Martyn Moxon and first-team coach - and ex-Australia fast bowler - Jason Gillespie.