The BBC was found to have committed a "significant breach" of media regulations by omitting to mention that the voice of a documentary about Gaza was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to accuracy".
The authority has ordered the BBC to transmit a prime-time announcement about its findings.
"As this represents a serious breach of our rules, we are instructing the corporation to air a announcement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a date to be finalised," the regulator stated.
'Possibility to Erode Trust'
The authority's statement stated: "The inquiry we conducted found that the programme's failure to disclose that the presenter's father occupied a post in the Hamas-administered authority was substantially inaccurate.
"It meant that the audience did not have essential details which may have been very significant to their assessment of the narrator and the information he shared.
"Trust is at the center of the bond between a broadcaster and its audience, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the risk to damage the exceptionally strong degrees of trust that audiences would have put in a BBC factual programme about the Gaza conflict."
The programme was removed from the BBC's streaming service in February after the narrator's familial connections were revealed, and in the month of July an broadcaster's internal assessment concluded it infringed the broadcaster's journalistic standards on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in line with the conclusions of the corporation's inquiry, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the regulator's ruling in its entirety. We will comply with the directive as soon as the timing and wording are determined."
