I don't think this is anything out of the ordinary for such a large deal, the authorities are duty bound to consider any possible consequence arising from such a big money take over.
Pitpass.com is saying such legal oversight is expected and the deal is structured to be dependant on all approvals and permissions being given before the serious money is committed.
Announcing the £8bn buy-out in early September, Liberty Media said it would purchase an initial 18.7% stake for $746m (£560m), with the remainder of the buy-out scheduled for the first quarter of 2017.
The company made clear at the time that "the completion of the acquisition is subject to certain conditions, including the receipt of certain clearances and approvals by antitrust and competition law authorities in various countries, certain third-party consents and approvals, including that of the FIA".
Courtesy Pitpass.com, 7th Nov 16.