"The answer you get to most of these questions can change depending on who you talk to (especially about things like brass tubes)."
In fact if you asked the question to the right person, you should have only one answer
Jean Pierre Dorion, Ministère des Ressources Naturelles et de la Faune, Quebec City. He is the man who provided the legal advice about the brass tube. Last year, Paul Mariner wanted to validate this information and had axactly the same answer than I.