According to Movie City Indie, Thailand is close to adopting a PG-25 rating, the most restrictive in the world:
The draft Film and Video Act has been written to replace the existing Film Act of 1930, but rather than being more progressive than this 77-year-old law, the new act is even more restrictive. The ratings system has a PG for general audiences, PG-15, restricting people 14 and under, and a newly proposed PG-25 rating, under which people 24 years and younger would be prohibited. An earlier draft had 17 as the oldest age to restrict moviegoers. If passed, it would be the highest age-restrictive rating in the world. Notoriously controlling Singapore, for example, has a 21-and-over category for films as its most restrictive rating."There are many things that can be said about this, but all I can manage right now is "holy shit..."