The British broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the presenter of a film about the Gaza conflict was the child of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, saying there had been "a serious error in relation to accuracy".
The authority has instructed the BBC to transmit a prime-time announcement about its conclusions.
"As this represents a major infringement of our regulations, we are ordering the broadcaster to air a statement of our findings against it on the BBC's second channel at 21:00, with a schedule to be finalised," the regulator stated.
'Risk to Damage Credibility'
The regulator's statement stated: "The inquiry we conducted concluded that the programme's failure to disclose that the presenter's male guardian held a position in the Hamas-run government was substantially inaccurate.
"Consequently that the viewers did not have critical information which may have been very significant to their evaluation of the narrator and the content he provided.
"Trust is at the center of the bond between a broadcaster and its viewers, particularly for a public service broadcaster such as the BBC.
"This failing had the risk to damage the very considerable amounts of confidence that viewers would have put in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was withdrawn from iPlayer in February after the boy's personal associations came to light, and in this past July an internal BBC review determined it breached the organization's editorial guidelines on truthfulness.
A corporation official said: "The regulator's decision is in agreement with the conclusions of Peter Johnston's review, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on factual correctness, which reflects clause 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in full. We will follow the directive as soon as the date and wording are determined."
