Liquor Licensing Act 1990

A police officer may require a person – the police officer reasonably believes is on licensed premises contrary to this Part or on premises specified in a liquor permit contrary to that permit; or whose entry onto licensed premises has lawfully been prohibited by or on behalf of the licensee; or whose entry onto permit premises has been prohibited in accordance with this Part; or who has lawfully been required by the licensee or a person acting with the authority of the licensee to leave licensed premises; or who has been required, in accordance with this Part, to leave permit premises– to leave those premises.

A police officer may – arrest without warrant a person who refuses to comply with a requirement made in accordance with subsection (1); and use such reasonable force as may be necessary to remove from licensed premises or permit premises a person who refuses to comply with a requirement made in accordance with subsection (1).