89   Investigation notice to stop plant or prevent disturbance of premises to allow investigation

(1)  An inspector who has entered premises under Part 5 may issue an investigation notice to the occupier of the premises if the inspector believes on reasonable grounds that it is necessary to issue the notice in order to facilitate the exercise of the inspector’s powers under Division 2 of that Part in respect of the premises.

(2)  An investigation notice must set out the grounds on which it is issued.

(3)  An investigation notice remains in force for the period, not exceeding 7 days, specified in the notice. A notice may be renewed more than once by an inspector by issuing a further investigation notice in accordance with this section.