The British broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the presenter of a documentary about Gaza was the son of a Hamas official, as determined by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The BBC's director general had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
The authority has instructed the corporation to transmit a peak-time statement about its conclusions.
"Since this amounts to a significant violation of our regulations, we are directing the BBC to transmit a statement of our determinations against it on BBC Two at 21:00, with a schedule to be determined," the regulator stated.
'Risk to Undermine Credibility'
The watchdog's statement said: "The inquiry we conducted concluded that the programme's lack of disclosure that the presenter's father occupied a position in the Hamas-run government was materially misleading.
"This implied that the audience did not have critical information which may have been extremely pertinent to their evaluation of the voice and the details he presented.
"Confidence is at the heart of the relationship between a broadcaster and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This failing had the risk to undermine the exceptionally strong amounts of credibility that the public would have put in a BBC factual programme about the conflict in Gaza."
The programme was withdrawn from iPlayer in last February after the narrator's familial connections were revealed, and in the month of July an internal BBC review concluded it violated the corporation's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The regulator's decision is in accordance with the results of Peter Johnston's review, that there was a serious error in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will adhere to the directive as soon as the schedule and language are determined."
