The BBC engaged in a "serious breach" of broadcasting rules by failing to disclose that the narrator of a programme about Gaza was the son of a Hamas official, according to UK media regulator Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The head of the BBC had already issued an apology, saying there had been "a serious error in relation to accuracy".
The authority has directed the BBC to air a peak-time statement about its decisions.
"As this represents a major infringement of our code, we are directing the BBC to transmit a statement of our conclusions against it on BBC2 at 21:00, with a schedule to be finalised," the statement read.
'Potential to Damage Credibility'
The authority's announcement said: "The inquiry we conducted found that the film's omission to reveal that the narrator's male guardian served in a role in the Hamas-run government was substantially inaccurate.
"This implied that the public did not have essential details which may have been extremely pertinent to their judgment of the presenter and the content he provided.
"Trust is at the core of the relationship between a media organization and its audience, especially for a public service broadcaster such as the BBC.
"This oversight had the risk to undermine the exceptionally strong degrees of confidence that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from the BBC's streaming service in the month of February after the boy's family links came to light, and in the month of July an corporation's own inquiry determined it violated the broadcaster's journalistic standards on accuracy.
A representative for the broadcaster stated: "The regulator's decision is in line with the conclusions of the internal assessment, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with the regulator's ruling in full. We will comply with the directive as soon as the schedule and wording are confirmed."
