You might recall that Twenty-First Century Fox wants to buy the whole of Sky in an £11.7 billion takeover but also that Fox itself has made a decision to sell nearly its entire TV broadcasting assets and film production studios to Disney.
Fox had already pledged to ensure the independence of Sky News.
USA cable giant Comcast gate crashed the deal in February when it said it would offer 12.50 pounds a share to buy Sky, compared to Fox's 10.75 pounds, although it has not yet made a formal bid.
David Madden, market analyst at CMC, described Fox's move to have Sky News sold to Disney as a "sweetener" to encourage the CMA to give the green light to the larger Sky takeover plan.
If Disney buys Sky News, it would clear the way for 21st Century Fox to complete the Sky takeover.
The ringfencing proposal for Sky News now calls for the news operation to be established as an independent company with its own independent board, but with a funding guarantee for 15 years, up from 10 years in a previous offer.
Fox already owns 39% of Sky and faces competition for control of the business from Comcast, which has lodged a richer bid. The Murdoch family's news outlets are now consumed by almost a third of the UK's population across TV, radio, online and newspapers.More news: Apple's own chips will replace Intel in MacBooks within 2 years
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"We have worked diligently with the CMA throughout its extensive review".
"As the regulatory process remains ongoing, shareholders are advised to take no action at this stage", the company said. "These enhanced remedies went above and beyond what Ofcom, the expert, independent regulator on United Kingdom broadcasting, had stated would mitigate concerns around media plurality", said 21st Century Fox in a statement.
Fox warned the CMA against accepting "a number of unsupported and fanciful assertions" by "a group of politicians", including Ed Miliband and Sir Vince Cable, who opposed to the deal.
Fox is meanwhile ramping up its Sky takeover efforts after U.S. cable giant Comcast offered more than £22 billion for the entire group in February.
In this scenario, Disney would end up acquiring Sky News whether or not its purchase of Fox's entertainment assets goes ahead.
A CMA spokeswoman said on Tuesday it had until May 1 to provide its report on the proposed deal to Britain's minister for digital matters, culture, media and sport.
"The fact that Disney has agreed to this today suggests that the next thing to expect is a revised bid from Fox/Disney for Sky, to match or beat Comcast's offer".