What is the appropriate age for NR rating?

What is the appropriate age for NR rating?

Rated PG-13: Parents Strongly Cautioned – Some material may be inappropriate for children under 13. Rated R: Restricted – Under 17 requires accompanying parent or adult guardian. Rated NC-17: No children under 17 admitted.

What is the NR rating on Netflix?

What does the NR (in rating system) mean? according to wikipedia…If a film has not been submitted for a rating or is an uncut version of a film that was submitted, the labels Not Rated (NR) or Unrated (UR) are often used.