The future of the English Football League is at stake in the sale of Derby County.
The conditions that suspended Derby's expulsion from the league have been changed.
All discussions between administrators and potential buyers should be brought to the attention of the league.
The league said it was "increasingly concerned" that the delays presented a risk to the integrity of next season's competition.
Derby had been given enough time to complete the sale, but more urgent action was needed to ensure the club's future as a continuing member of the EFL.
He said that it was important that a sale of the club was concluded at the earliest opportunity.
The Rams have been in administration since the first notice of withdrawal was issued.
The league has changed the notice due to the lack of progress by the club's administrators.
The preferred bidder was named on April 6th. They reached a sale and purchase agreement with him on 16 May.
Kirchner has not transferred the funds that would allow the deal to be completed despite providing proof of funding.
Derby, who were demoted from the Championship last season, have just five first-team players left.
The club can't sign players or offer fresh deals to those whose contracts are about to end.
Simon Stone is a sports reporter for the British Broadcasting Corporation.
The English Football League want to avoid being seen as hostile by the public.
There are important issues to address before the new season and they hope their actions will speed up the process of a new owner.
Since the American was named as Derby's preferred bidder on April 6, there has been an exclusive period around him.
They want to avoid that situation again. They feel their involvement would allow buyers to go through the owners' and directors' test at the same time as the procedure to buy the club, so they don't have to wait for the second part to happen.
There isn't anything in the regulations that would prevent Derby from going into administration. Proof of funding and a break-even budget are required by the EFL.
It is possible that costs will be cut more than they already have been, with the EFL wary about the make-up of Derby's likely squad.
Concerns about the welfare of young players having to play against senior professionals in league matches led to the cancellation of the first match of the season.