New Zealand has used a colour-coded labelling system since 1987. The colours are intended to resemble the messages conveyed by a traffic light: a green label means that nothing in the film, video or DVD should inhibit anyone from viewing it; a yellow label means proceed with caution because the film, video or DVD may have content that younger viewers should not see; and a red label means stop and ensure that no one outside the restriction views the film, video, DVD or computer game. It is an offence to supply age-restricted material to anyone under the age shown on the label.