The British broadcaster engaged in a "significant breach" of broadcasting rules by omitting to mention that the presenter of a programme about the Gaza situation was the offspring of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, noting there had been "a serious error in relation to truthfulness".
Ofcom has instructed the broadcaster to transmit a peak-time statement about its decisions.
"Given this constitutes a significant violation of our code, we are directing the broadcaster to air a message of our conclusions against it on BBC Two at 21:00, with a schedule to be determined," the statement read.
'Risk to Damage Confidence'
The authority's announcement declared: "Our investigation found that the programme's omission to reveal that the narrator's parent occupied a position in the Hamas-run government was significantly deceptive.
"It meant that the audience did not have vital facts which may have been highly relevant to their evaluation of the narrator and the content he provided.
"Credibility is at the center of the bond between a television network and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the risk to undermine the significantly high amounts of confidence that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was removed from the BBC's streaming service in February after the narrator's familial connections emerged, and in the month of July an internal BBC review found it breached the broadcaster's journalistic standards on accuracy.
A representative for the broadcaster commented: "The authority's determination is in agreement with the results of the internal assessment, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in full. We will comply with the directive as soon as the schedule and wording are determined."
