Police Powers and Responsibilities Act 2000

If a police officer considers an independent person is unreasonably interfering with the performance of a forensic procedure, the police officer may exclude the independent person from being present while the procedure is being performed.

Before excluding the independent person, the police officer must—

warn the person not to unreasonably interfere with the performance of the procedure; and

tell the person that the person may be excluded from being present if the person continues to unreasonably interfere with the performance of the procedure; and

give the person 1 opportunity to stop unreasonably interfering.