The BBC was found to have committed a "serious breach" of industry standards by omitting to mention that the presenter of a documentary about the Gaza conflict was the son of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a significant failing in relation to accuracy".
The regulator has directed the corporation to transmit a prime-time statement about its decisions.
"Given this constitutes a significant violation of our regulations, we are instructing the corporation to air a announcement of our determinations against it on BBC2 at 21:00, with a timing to be determined," it said.
'Risk to Damage Credibility'
The regulator's statement stated: "The inquiry we conducted concluded that the film's lack of disclosure that the narrator's parent served in a post in the Hamas-administered authority was substantially inaccurate.
"It meant that the public did not have critical information which may have been very significant to their judgment of the presenter and the details he shared.
"Credibility is at the core of the relationship between a television network and its viewers, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to damage the significantly high levels of trust that audiences would have placed in a BBC factual programme about the Gaza conflict."
The film was pulled from the BBC's streaming service in February after the boy's family links came to light, and in the month of July an internal BBC review found it violated the broadcaster's journalistic standards on truthfulness.
A BBC spokesperson said: "The regulator's decision is in agreement with the findings of Peter Johnston's review, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the regulator's ruling in its entirety. We will adhere to the directive as soon as the timing and wording are finalised."
