s 140 Protection of informers
(1) Except as provided in subsections (2) and (3), no witness in any civil or criminal proceedings pursuant to this Act shall be obliged or permitted to disclose the name or address of any informer or the substance and nature of the information received from him or state any matter which might lead to his discovery. (2) If any computer, book, account, computerized data or other document, signboard, card, letter, pamphlet, leaflet, notice, equipment, instrument or article which is in evidence or is liable to inspection in any civil or criminal proceedings whatsoever contains any entry in which any informer is named or described or which might lead to his discovery, the court shall cause all such entries to be concealed from view or to be obliterated in so far as may be necessary to protect the informer from discovery. (3) If in a trial for any offence under this Act the court, after full inquiry into the case, is of the opinion that the informer wilfully made in his complaint a material statement which he knew or believed to be false or did not believe to be true, or if in any other proceedings the court is of the opinion that justice cannot be fully done between the parties in the proceeding without the discovery of the informer, the court may require the production of the original complaint, if in writing, and permit an inquiry and require full disclosure concerning the informer.