s 29 Protection of informers
(1) Except as hereinafter mentioned, no evidence as to any written or oral information in respect of any offence alleged to have been committed against this Act or any regulations made thereunder shall be admitted in evidence in any civil or criminal proceedings whatsoever, and no witness shall be obliged or permitted to disclose the name or address of any informers or to state any matter which might lead to the discovery of the identity of the informer. (2) If any books, documents or papers which are in evidence or liable to inspection in any civil or criminal proceedings whatsoever contain any entry in which any informer is named or described or which might lead to the discovery of his identity, the court shall cause all such passages to be concealed from view or to be obliterated so far as may be necessary to prevent the discovery of the identity of the informer, but no further. (3) If in any civil or criminal proceedings whatsoever the court, after full enquiry into the case, is of the opinion that the informer wilfully made in any information furnished by him a material statement which he knew or believed to be false or did not believe to be true, or the court is of the opinion that justice cannot be fully done without the discovery of the identity of the informer, it shall be lawful for the court to require the production of the original information, if in writing, and to permit enquiry and require full disclosure concerning the informer. (4) For the purpose of this section “informer” includes every person who is not called as a witness for the prosecution in a criminal case and who has made any complaint or report or furnished any information, oral or documentary, in respect of any offence against this Act alleged to have been committed by any person.