A 'PG' film should be for general viewing, however, some scenes may be unsuitable for young children. References to illegal drugs may be used but only with a suitable anti-drug message. Frightening scenes should not be intense, and mild bad language may be used. Sexual activity may be implied but discreetly and infrequent. Moderate violence, without detail, may be allowed if justified by context.
A '12A/12' is only suitable for those aged 12 and over. Any misuse of drugs must be infrequent. Moderate physical and psychological threat may be permitted. Dangerous behaviour (hanging, suicide, self harming) should not be in detail. Moderate language is allowed and the use of strong language must be infrequent. Nudity is allowed but in sexual context it must be discreet. Sexual activity may be briefly and discreetly portrayed. Moderate violence is allowed but shouldn't be in too much detail. There should be no emphasis on injuries or blood but occasional gory moments may be permitted if justified by context.
A '15' film is only suitable for those aged 15 and over. Drug taking may been shown but the film must not encourage drug misuse. Strong threat and menace are permitted. Dangerous behaviour should not be in too much detail. Frequent strong language is permitted but the strongest terms are only accepted if justified by the context. Nudity may be allowed in a sexual context but without strong detail. Sexual activity may be portrayed without strong detail and there may be strong verbal references to sexual behaviour but the strongest may not be accepted unless justified by context. Violence may be strong but shouldn't be in too much detail of pain or injury.
An '18' film is only suitable for adults. It generally can have whatever it likes in it although the content may not harm the viewers or be intended for use of sexual stimulation, this would only be accepted in an 'R18'.