Queensland Police Powers and Responsibilities Act
Part 3 Crime scenes
Division 1 Establishment of crime scenes
(3) The responsible officer may establish the crime scene in any way that gives anyone wanting to enter the place enough notice that the place is a crime scene.
Examples
1 A police officer may stand at a door to stop people entering a building and tell them they can not enter the building.
2 A police officer may put around a place barricades or tapes indicating the place is a crime scene.
3 A police officer may display a written notice stating the place is a crime scene and unauthorised entry is prohibited.
Division 2 Crime scene warrants
166 Responsibility after establishing crime scene
(1) As soon as reasonably practicable after the responsible officer establishes the crime scene, a police officer must apply to a Supreme Court judge or magistrate for a crime scene warrant.
171 Consideration of application and issue of crime scene warrant
(1) Before issuing a crime scene warrant, the issuer must have regard to the following
(a) the nature and seriousness of the suspected offence;
(b) the likely extent of interference to be caused to the
occupier of the place;
(c) the time, of not more than 7 days, for which it is
reasonable to maintain a crime scene;
(d) any submissions made by the occupier.
[
B](2) The issuer may issue a crime scene warrant only if reasonably satisfied the place is a crime scene[/B].
(3) If before the application is considered, the place stops being a crime scene, the issuer may issue a crime scene warrant that has effect only for the time the place was a crime scene
http://www.legislation.qld.gov.au/LEGISLTN/current/P/PolicePowResA00.pdf
