The BBC engaged in a "major breach" of broadcasting rules by omitting to mention that the presenter of a documentary about the Gaza conflict was the offspring of a Hamas administrator, as determined by UK media regulator Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The head of the BBC had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The authority has instructed the corporation to transmit a peak-time announcement about its conclusions.
"As this represents a major infringement of our rules, we are instructing the broadcaster to transmit a statement of our conclusions against it on BBC2 at 21:00, with a timing to be finalised," the regulator stated.
'Risk to Damage Trust'
The authority's statement declared: "Our probe concluded that the programme's failure to disclose that the narrator's male guardian served in a role in the Hamas-controlled government was significantly deceptive.
"It meant that the public did not have essential details which may have been extremely pertinent to their assessment of the narrator and the information he provided.
"Credibility is at the center of the bond between a media organization and its public, especially for a national broadcasting corporation such as the BBC.
"This failing had the risk to damage the very considerable levels of confidence that audiences would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from iPlayer in last February after the boy's personal associations emerged, and in this past July an corporation's own inquiry found it infringed the organization's journalistic standards on factual correctness.
A corporation official commented: "The authority's determination is in agreement with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will adhere to the directive as soon as the timing and wording are confirmed."