Mansfield will lease Field Mill from former chairman Keith Haslam

Derry told Mansfield's website: "There are stringent Football League rules in forming a new company following the problems at Leeds and other clubs.

"Things need to be done in greater detail to assess the liabilities when you are taking on a football club.

"I expect (the contract) to be sorted out sooner rather than later."

Derry announced just over a week ago that he had agreed to buy the Stags from Haslam, who has retained ownership of their Field Mill ground and will lease it to the club.