How Legion of Decency Ratings Developed Further
The A rating was subsequently divided:
A-I: Suitable for all audiences
A-II: Suitable for adults -- then, with the introduction of A-III -- suitable for adults and adolescents
A-III: Suitable for adults only
A-IV: For adults with reservations
In 1978, the B and C ratings were combined into a new O rating for "morally offensive" films.