Yes, I would just read a phrase from paragraph 2 of article 21 that says:
Each State Party shall...make its best efforts to discourage States not party to this Convention from using cluster munitions.
All of the exceptions that have been written into clause 11 of the bill don't strike me as the best efforts to discourage states from using cluster munitions. It really seems to me that it not only encourages other states to use them, but also gives a pass for Canadian Armed Forces to use them in situations of interoperability.