Corrections Act 1997

A correctional officer may use force under this Part only if the correctional officer – gives a clear warning of the intended use of force; and allows enough time for the warning to be observed; and uses no more force than is necessary and reasonable in the circumstances; and uses force, as far as practicable, in a way that reduces the risk of causing death or grievous bodily harm.

However, a correctional officer need not comply with subsection (1)(a) or (b) if, in urgent circumstances, the correctional officer believes, on reasonable grounds, that doing so would create a risk of injury to the correctional officer, the prisoner or detainee or any other person.