Andy Webster has been given permission to play for Rangers following a meeting of the Scottish Football Association Board of Directors on Monday.
Andy Webster was allowed to move to Wigan by Fifa
Rangers will be able to field Webster despite a complaint from Hearts about the player's eligibility.
The Scotland defender, who joined on a loan deal from Wigan, had his case referred to Fifa.
And the SFA have now transferred the 24-year-old's registration from Hearts to Rangers with immediate effect.
Wigan signed Webster after the player exploited a new Fifa ruling to free himself from his contract.
Hearts had contested Webster's right to move to Wigan and cut short his four-year deal at Tynecastle by a year.
But Fifa allowed him to sign for the English Premiership club pending a ruling on a compensation fee to the Edinburgh club, which has yet to be agreed.
Webster failed to command a regular first-team place with Wigan, leading to a loan agreement with Rangers.
Webster was injured in his first training session with Rangers last week and will be out of action for about six weeks.