The BBC engaged in a "serious breach" of broadcasting rules by failing to disclose that the voice of a film about Gaza was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The head of the BBC had already issued an apology, saying there had been "a significant failing in relation to factual correctness".
The regulator has instructed the corporation to transmit a prime-time announcement about its decisions.
"Given this constitutes a significant violation of our regulations, we are instructing the BBC to transmit a announcement of our conclusions against it on the BBC's second channel at 9pm, with a timing to be finalised," it said.
'Risk to Damage Credibility'
The authority's report declared: "Our investigation found that the documentary's failure to disclose that the narrator's male guardian held a role in the Hamas-administered authority was materially misleading.
"Consequently that the public did not have critical information which may have been extremely pertinent to their assessment of the presenter and the details he provided.
"Credibility is at the heart of the connection between a media organization and its public, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the possibility to erode the exceptionally strong levels of credibility that audiences would have put in a factual film from the broadcaster about the conflict in Gaza."
The film was removed from the BBC's streaming service in February after the boy's personal associations were revealed, and in this past July an corporation's own inquiry found it violated the broadcaster's journalistic standards on truthfulness.
A corporation official commented: "The regulator's decision is in agreement with the results of Peter Johnston's review, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with Ofcom's decision in full. We will follow the sanction as soon as the schedule and wording are finalised."
