Avram Grant's long-term future as Jose Mourinho's successor at Chelsea could be in doubt because he lacks the required coaching licence.
Grant has won league title while coaching in Israel
Uefa and Premier League rules require anyone wishing to manage in the top flight to hold the Uefa pro licence.
But Chelsea have confirmed that Grant does not have one, and he now requires special dispensation to manage the club for more than 12 weeks.
The pro licence requires 240 hours of study and usually takes a year to gain.
"We have written to Chelsea to remind them of these
requirements regarding these qualifications," said a Premier League spokesman.
In the past the Premier League has granted extensions beyond the 12-week period of grace in a couple of exceptional cases.
Glenn Roeder received an extension on health grounds while Gareth Southgate was deemed to have had restricted opportunities to gain a licence because of his international career.
Martin O'Neill was also granted an exemption after undergoing a five-day refresher course.
Grant has not held a manager's position for five years but won league titles when coaching in Israel.