31   Use of force

(1)  Reasonable force may be used for the purpose of gaining entry to premises but only if the Commissioner:

(a)  has authorised in writing the use of force in the particular case, or

(b)  has specified in writing the circumstances that are required to exist before force may be used and the particular case falls within those circumstances.

(2)  If a person authorised to enter premises uses force to do so, the person must, as soon as practicable, inform the Commissioner.

(3)  The Commissioner must give notice of the use of force to such persons or authorities as appear to the Commissioner to be appropriate in the circumstances.