The BBC was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the voice of a film about the Gaza situation was the offspring of a Hamas official, as determined by British broadcasting authority Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to accuracy".
The authority has directed the BBC to broadcast a evening statement about its decisions.
"Since this amounts to a major infringement of our regulations, we are instructing the BBC to air a statement of our determinations against it on the BBC's second channel at 21:00, with a timing to be determined," it said.
'Risk to Damage Credibility'
The authority's announcement said: "Our probe determined that the programme's failure to disclose that the narrator's male guardian served in a role in the Hamas-administered authority was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been highly relevant to their judgment of the voice and the content he presented.
"Trust is at the core of the connection between a television network and its viewers, particularly for a public service broadcaster such as the BBC.
"This failing had the risk to undermine the significantly high degrees of trust that audiences would have invested in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from the BBC's streaming service in last February after the presenter's familial connections came to light, and in July an internal BBC review determined it infringed the organization's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The authority's determination is in agreement with the results of the internal assessment, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the authority's determination in full. We will follow the directive as soon as the date and wording are confirmed."
