American film ratings look official enough to be mistaken for regulation. They are produced by a voluntary industry system whose structure explains most of its recurring controversies.
The system is private and voluntary
No federal or state agency assigns ratings to films. The board is operated by the film industry's trade association together with theater owners, and submission is optional.
The leverage is commercial rather than legal. Major theater chains generally decline unrated films, and many advertising outlets will not carry them, so distribution effectively requires a rating.
The arrangement dates from the replacement of an earlier production code, when the industry chose to describe content for parents instead of dictating what films could contain.
Raters are parents, not critics
The board is staffed by people recruited as parents of children in a certain age range, serving for a limited term. They are not required to have film or child development credentials.
Their stated task is to estimate what most American parents would consider appropriate, which is an empirical guess about a moving public standard rather than an application of fixed rules.
Because standards shift, a film rated one way in an earlier decade might be rated differently today. Violence and language have moved on different trajectories.
Written criteria are deliberately thin
Published guidance describes categories in general terms and names a few specific triggers, such as certain language appearing more than once pushing a film upward.
Most decisions rest on impression rather than a checklist. The board issues a rating with a short descriptor and, on request, indicates what drove it.
The absence of a rulebook is the source of long-standing criticism, particularly around inconsistent treatment of sexual content compared with violence.
Editing to a target rating is routine
Studios usually know the rating a film needs before shooting begins, because the rating determines which audiences can buy tickets and which channels will run advertising.
Films are submitted, receive a rating, and are recut and resubmitted until the target is reached. Home releases sometimes restore the removed material.
The strictest adult category carries such heavy commercial penalties that most distributors treat it as unusable, releasing films unrated instead.
Appeals go to a separate panel
A filmmaker who disputes a rating can appeal to a board drawn from distributors and exhibitors, presenting arguments alongside the ratings board.
Overturning a decision requires a substantial majority, so appeals succeed infrequently. Most disputes are resolved by cutting the film instead.