Following a campaign led by Mary Whitehouse and the NVALA, prosecutions were commenced against individuals engaged in trades exploiting allegedly obscene videos. To assist local authorities in identifying obscene films, the Director of Public Prosecutions released a list of 72 films the office believed to violate the Obscene Publications Act 1959 and another list of 82 titles which they felt may not achieve successful prosecutions but could nonetheless be forfeited under the lesser Section 3 obscenity charge. This list included films in respect of which individuals had previously been acquitted of obscenity which had already obtained BBFC certification. The subsequent revisions to the list and confusion regarding what constituted obscene material led to Parliament passing the Video Recordings Act 1984, which required certification of video releases by the BBFC.