Sprinter Dwain Chambers has been cleared to compete at Sunday's Norwich Union British Grand Prix in Gateshead.
Chambers has recently finished serving a two-year drugs ban
The 28-year-old could contest his first competitive race in the 100m since he completed his two-year drugs ban.
Chambers agreed a deal with the IAAF, athletics' governing body, to repay them the money he earned during the period he was taking banned drugs.
UK Athletics has now received a written agreement from the Briton in relation to the money owed to them.
It would now appear to be up to Chambers himself to decide whether he is ready to return to the track at such a high-profile event.
Event organisers Fast Track confirmed they are still holding a lane open for Chambers, who is thought to owe the IAAF £120,000.
The deadline for submitting final start lists is 1900 (BST) on Saturday .
Chambers has been training in Jamaica under new coach Glen Mills, who also coaches former world 100m champion Kim Collins and Jamaican 200m star Usain Bolt.
I think the British sprinters are getting a little bit too comfortable
Those who have seen Chambers in action claim he is close to the form that won him European 100m gold in 2002.
If he competes in Gateshead, the 28-year-old will line up against Britons Mark Lewis-Francis, Darren Campbell and Marlon Devonish, who are all vying for a European Cup spot for the Malaga match on 28 June.
UK Athletics performance director has already stated Chambers will not be treated differently to any other athlete when he returns.
Meanwhile, Powell, who has been training in Gateshead, has set his sights on breaking Chambers' meet record of 10.05 seconds - and he does not expect to face much opposition from Britain's sprinters in his attempt.
"I'm looking to staying under 10 seconds and having had a good look at the track, there's no reason why I can't do it at the weekend," Powell said.
"I think the British sprinters are getting a little bit too comfortable.
"They need to continue working hard and don't let the recognition (of their Olympic 4x100m golds) and whatever else they are getting, stop them focusing."
Jason Gardener will not race against Powell as he has withdrawn from Sunday's race with a back injury.
Tim Benjamin, who topped Europe's 400m rankings last year, has also pulled out of the Gateshead meeting after two disappointing performances in the last week.
The Welshman has only recently recovered from a groin injury and has decided to concentrate on training.