The document discusses different age rating certificates (U, PG, 12A, 15, 18) in the UK film classification system. It provides details on the types of content allowed under each rating, such as language, sexual content, violence, and drug use. The author believes the 15 rating is most suitable for their film opening, as it allows for strong language, moderate sexual activity and violence, but does not permit very strong or sexually explicit content like the 18 rating.