The affected countries have been making good-faith efforts to comply, but only about half of them would be able to meet this deadline.

FORBES: Fact and Comment

As we've said, the goal is to make sure that there is an appointment before June and we're confident that we're going to be able to meet that deadline.

WHITEHOUSE: The White House

The company which operates the track has faced legal and planning problems since being given the rights to stage the race and has declined all week to comment on whether it will be able to meet the latest deadline set by Mr Ecclestone.

BBC: Donington quiet as deadline nears