30   Protection from incrimination

(1)  A natural person is not excused from a requirement under section 29 to produce a document or statement or to answer a question on the ground that the document, statement or answer might incriminate the person or make the person liable to a penalty.

(2)  However, any answer given by a natural person in compliance with a requirement under section 29 is not admissible in evidence against the person in criminal proceedings (except proceedings for an offence under section 29) if:

(a)  the person objected at the time to doing so on the ground that it might incriminate the person, or

(b)  the person was not warned on that occasion that the person may object to giving the answer on the ground that it might incriminate the person.

(3)  Any document or statement produced by a person in compliance with a requirement under section 29 is not inadmissible in evidence against the person in criminal proceedings on the ground that the document or statement might incriminate the person.

(4)  Further information obtained as a result of a document or statement produced or an answer given in compliance with a requirement under section 29 is not inadmissible on the ground:

(a)  that the document, statement or answer had to be produced or given, or

(b)  that the document, statement or answer might incriminate the person.