What is the difference between the UK 12A category and the American PG-13?
The main difference is that ’12A’ means that children under 12 must be accompanied by an adult, whereas ‘PG-13’ allows anybody to go in, regardless of whether or not they are accompanied. Basically, ‘PG-13’ is merely a ‘caution’ to parents. In terms of what’s allowed at ‘PG-13’, it’s fair to say that more violence is allowed at ‘PG-13′ than at ’12A’ (some ‘PG-13′ action films have been passed ’15’ here), whereas we might be inclined to allow slightly more sexual activity/innuendo at ’12A’ than the Americans would be comfortable with at ‘PG-13’.