The TV Parental Guidelines system is a television content rating system that was first proposed on December 19, 1996 by the United States Congress, the television industry and the Federal Communications Commission (FCC), and went into effect by January 1, 1997 on most major U.S. broadcast and cable networks in response to public concerns of increasingly explicit sexual content, graphic violence and strong profanity in television programs. It was established as a voluntary-participation system, with ratings to be determined by the individually participating broadcast and cable networks. Almost every Nickelodeon show have been assigned a rating. As of today, most Nickelodeon programs have been rated TV-Y, TV-Y7, and TV-G.
TV-Y - This program is designed to be appropriate for all children.
TV-Y7 - This program is designed for children age 7 and above.
TV-G - Most parents would find this program suitable for all ages.
TV-PG - This program contains material that parents may not find suitable for younger children (rarely seen).
TV-14 - This program contains some material that many parents would not find suitable for children under 14 years of age (rarely seen).
TV-MA (not used) - This program is specifically designed to be viewed by adults and therefore may not be suitable for children under 17.