A little history:
I found TMP was the only Star Trek to carry a G rating when it was first released. However, in 1984 the Motion Picture Association of America split PG into a second category: PG13. They later updated TMP with a PG rating.
All but two Star Treks films received PG ratings. Insurrection and Nemesis both were rated PG13.
I bet the new Star Trek film will carry a PG13 which seems to be contemporary.
I AM ANOTHER FRIEND OF ZARDOZ: