"To be restricted, a film must deal with matters such as sex, horror, crime, cruelty, violence or offensive language. The most common restrictions are R13, R16, and R18."
"Restrictions mean that only those who are of, or are over, the age of the restriction can be shown the film."
"This is a legal requirement, and schools could be prosecuted if it is breached. A teacher showing an R16 film to students under the age of 16 could face fines of up to $10,000 or be imprisoned for up to three months. The school could also be considered liable, in which case the fines could be up to $25,000."