"Impartiality is the bedrock of the BBC".
He said the BBC would be publishing new guidance for staff and contributors on social media in the next couple of weeks.
Although this will not amount to a ban in any way, there will be a specific set of rules - with news and current affairs being subject to a tighter set of guidelines. As part of his new deal, the Match of the Day presenter will take a 23 per cent pay cut and has agreed to be more careful on Twitter, where his support and criticism for various political causes has seen him become a divisive figure.
The lack of diversity in the top-10 list of highest-paid BBC stars means the BBC has more "work to do" on the issue, the boss of the broadcaster has admitted.
Zoe Ball tops the list of women taking home a pay cheque of £1.36m, a pay rise of a £1m since a year ago.
The "rich list" has been published in the corporation's annual report, which in 2016/17 revealed the split between men and women was 75:25 - with no women in the top 10 earners.
In fact, 76 of the BBC's presenters now earn more than UK Prime Minister Boris Johnson, whose annual salary is £150,000.
"We will continue to press the BBC on how well the license fee payer is served as part of our ongoing inquiry into the role of public service broadcasting in this digital age", Knight added. "I am expecting people to come to the BBC at a significant discount to what they could get in the open market", said Davie.
The report also notes that the gender pay gap has fallen for the third year in a row to 6.2%, a third down from 2017's 9.3% and well below the national pay gap of 17.3%.
The BBC Annual Report confirmed that Zoe's pay soared from £370,000 in 2019 to a minimum of £1.36 million.