In legal terms, documents and information that come into the hands of members of Parliament in their capacity as members of a House committee--and I said this earlier to another committee--are subject to whatever rules the committee might make about disclosure of those documents. WIth respect to other documents that might come into the possession of a member of Parliament--the proverbial brown envelope information--it's up to the member of Parliament what she does with it. But she may run the risk of bringing a lawsuit against herself if she publicly discloses information that's defamatory of an individual or in some other respect contravenes the law. In a proceeding of the House or of a committee, those are privileged and there can't be any legal proceedings flowing from any disclosure in that context.
On March 16th, 2011. See this statement in context.