The Advertising Standards Authority (ASA) is the independent regulator of advertising across all UK media. They apply advertising codes written by the Committees of Advertising Practice (CAP) to take action against misleading, harmful, or offensive advertisements. ASA can deal with most complaints, but may refer some to other regulators like Ofcom, with whom they have a co-regulatory agreement. The advertising codes aim to protect people, especially youth, from ads involving pornography, gambling or misleading claims. Advertisers can check the ASA website for the rules to ensure their ads comply with these standards.