identity of a victim of a sexual offence) will be prosecuted. Communications that express an "unpopular or unfashionable opinion about serious or trivial matters, or banter or humour, even if distasteful to some and painful to those subjected to it" will not. Communications that are merely "grossly offensive, indecent, obscene or false" will be prosecuted only when it can be shown to be necessary and proportionate. People who pass on malicious messages, such as by retweeting, can also be prosecuted when the original message is subject to prosecution. Individuals who post messages as part of a separate crime, such as a plan to import drugs, would face prosecution for that offence, as is currently the case. Revisions to the interim guidelines were issued on 20 June 2013 following a public consultation. The revisions specified that prosecutors should consider: whether messages were aggravated by references to race, religion or other minorities, and whether they breached existing rules to counter harassment or stalking; and the age and maturity of any wrongdoer should be taken into account and given great weight. The revisions also clarified that criminal prosecutions were "unlikely": when the author of the message had "expressed genuine remorse"; when "swift and effective action ... to remove the communication" was taken; or when messages were not intended for a wide audience. Amendments to the act Regulations amended the act in 2009 and 2010, making Ofcom the co-regulator for video on demand in the UK, along with ATVOD and the Advertising Standards Authority. The Digital Economy Act 2010 amended the Communications Act 2003, giving Ofcom the responsibility of enforcing regulations concerning Internet copyright breaches. The Postal Services Act 2011 allowed Ofcom to take over regulatory responsibility for the Royal Mail from the Postal Services Commission. The Audiovisual Media Services Regulations 2014 amended the Communications Act 2003 to set out statutory and legal obligations for media distributors of on-demand content. The regulations define the content that can legally be distributed under an R18 certificate and make it a criminal offence to not adequately restrict access to such content to those aged over 18. Notable prosecutions 2012: Paul Chambers made a joke on Twitter in response to Robin Hood Airport cancelling flights. He said that unless the facility resolved the problem within a week, he would be "blowing the airport sky high". After an off-duty manager discovered the post, Chambers was arrested by anti-terror police.