I don't think it would be appropriate for me to comment on the specific nature of a working group. What I would say is that the CBSA meets actively with most of our government partners. We provide them advice on a regular basis. Depending on the form or method that's developed, we would participate and provide advice and border expertise as required within whatever that forum is.
Evidence of meeting #12 for Fisheries and Oceans in the 44th Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was question.
A video is available from Parliament.