The BBC engaged in a "significant breach" of broadcasting rules by omitting to mention that the voice of a programme about Gaza was the son of a Hamas representative, as ruled by UK media regulator Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to factual correctness".
The regulator has directed the BBC to air a prime-time declaration about its conclusions.
"As this represents a major infringement of our regulations, we are directing the BBC to air a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a schedule to be confirmed," the regulator stated.
'Potential to Undermine Trust'
The authority's announcement declared: "The inquiry we conducted concluded that the documentary's lack of disclosure that the presenter's parent held a post in the Hamas-controlled authority was significantly deceptive.
"This implied that the viewers did not have critical information which may have been highly relevant to their judgment of the presenter and the information he presented.
"Trust is at the core of the relationship between a television network and its audience, notably for a public service broadcaster such as the public broadcaster.
"This failing had the potential to erode the very considerable degrees of confidence that audiences would have invested in a factual film from the broadcaster about the Gaza conflict."
The programme was pulled from iPlayer in the month of February after the boy's familial connections were revealed, and in July an internal BBC review concluded it infringed the organization's journalistic standards on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will adhere to the sanction as soon as the schedule and language are finalised."
