A restricted rating, as opposed to an advisory or unrestricted rating, is one that restricts its audience to a particular group of people, usually to prevent underage children from seeing large amounts of violence, strong language, or sexual content.
A partially restricted rating prevents anyone underage from viewing the content in the cinema unless when accompanied by a parent or guardian for the duration of the film. In the MPA rating system, R is partially restricted as it states that people under 17 can see an R-rated picture in a cinema, if they're accompanied by a parent or adult guardian.
A fully restricted rating prevents anyone underage from viewing the content regardless of accompaniment. In the MPA rating system, NC-17 is a fully restricted rating, and nobody under 18 may see a picture with this rating, even if accompanied by an adult.
Adult ratings may be restricted to make sure that underage children aren't exposed to pornography or gratuitous violence, as well as coarse or sexually explicit language and drug (mis)use.
Underage audiences are not admitted at all, and anyone between the two stipulated ages must be accompanied by an adult. For example, 18A in the Maritimes and Manitoba, where children below 14 years of age are not admitted at all, and children between 14 and 17 must be accompanied by an adult.
Works which receive adult ratings can only be shown in licensed premises such as sex shops. For example, the BBFC's R18 classification.
Special restrictions may also apply for these ratings. For example, Australia's X 18+ classification, in which all X 18+ classified material cannot be sold anywhere in the six States, making it available legally for sale only in the ACT and the NT.
One unusual case of non-pornographic material receiving such rating is Saw VI by the ICAA in Spain because of extreme violence, which resulted in the release of the film in the country being delayed for nearly one year.
Table of restricted ratings from various boards
|Board||Partially restricted||Hybrid||Fully restricted||Adult||Not to be sold (or shown anywhere)|
|MPAA||R (17)||none||NC-17 (18)||none||none|
|BBFC (UK)||12A||none||12, 15, 18||R18||Rejected|
|IFCO (Ireland)||12A, 15A||none||16, 18||none||none|
|FSK (Germany)||none||12 (under 6s not admitted)||6, 16, 18, Unrated (18+)||none||none|
|RCQ (Régie; Quebec)||13+||none||16+, 18+||18+ (Explicit Sexuality)||Refused classification|
|Canada (outside Quebec)||14A, 18A||18A (14+ in Maritimes and Manitoba)||R||A||Prohibited|
|Eirin (Japan)||none||none||R15+, R18+||none||none|
|BAMID (Taiwan)||none||6+ (under 6s not admitted, parental guide is required for 6-11s)||12+, 15+, 18+||none||none|
|KMRB (South Korea)||12, 15||none||18||19||none|
|OFNAA (Hong Kong)||none||none||III (18)||none||none|
|MTRCB (Philippines)||PG (13)||none||R-13, R-16, R-18||none||X|
|MDA (Singapore)||none||none||NC-16, M18, R21||none||NAR|
|FPB (South Africa)||none|| 7-9 PG, 10-12 PG|
(under the lower age limits not admitted at all)
|13, 16, 18||X18||XX|
|OFLC (New Zealand)||RP labels||none||R labels||none||Objectionable|