I think the most important rating is ‘Not watching youth’.
When movie receive ‘Not watching youth’ , reason is sexuality and violence.
Out of all of these ranks, I believe that the rank requires parental guidance is the most important.
The movie that require parental guidance includes lots of violent and inappropriate scenes.
Also the most important factor that determines think rank is the sexuality.
BBFC has the many detailed guidelines.
In the korea has just four and five guidelines.
BBFC divide 12 into 12 and 12A , and The reason that there were between detail.
Not also 12 but 18.
In the BBFC, It is broken into various grades based on various criteria.
We have to watch movie of appropriate age rating of the movie.