The BBC was found to have committed a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about Gaza was the son of a Hamas administrator, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, saying there had been "a serious error in relation to accuracy".
The authority has directed the broadcaster to transmit a prime-time statement about its decisions.
"As this represents a significant violation of our rules, we are directing the corporation to air a announcement of our findings against it on BBC2 at 21:00, with a timing to be finalised," the statement read.
'Potential to Erode Confidence'
The regulator's announcement declared: "The inquiry we conducted concluded that the film's failure to disclose that the narrator's parent held a role in the Hamas-administered government was materially misleading.
"It meant that the public did not have vital facts which may have been extremely pertinent to their assessment of the voice and the details he presented.
"Trust is at the center of the connection between a broadcaster and its viewers, especially for a state-funded media outlet such as the public broadcaster.
"This oversight had the risk to damage the very considerable degrees of trust that audiences would have put in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from iPlayer in last February after the boy's familial connections emerged, and in July an internal BBC review found it violated the organization's editorial guidelines on truthfulness.
A representative for the broadcaster said: "The Ofcom ruling is in accordance with the findings of Peter Johnston's review, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in complete. We will comply with the directive as soon as the timing and language are confirmed."
