47. (1) Where a sample taken from a person under section 41, 42 or 45 proves to be insufficient or was inadequately labelled or, for any other good reason, the Commissioner considers that it is necessary for a second or further such sample to be taken from the person, a second or further sample may be taken from him or her in accordance with whichever of those sections is appropriate.

(2) Where a sample taken from a person under section 43 or 46 proves to be insufficient or was inadequately labelled or, for any other good reason, the Director of FSI considers that it is necessary for a second or further such sample to be taken from the person, a second or further sample may be taken from him or her in accordance with whichever of those sections is appropriate.