The CAP and Trade System for greenhouse gas emission (C.T.) has increased of $0,003/liter on July 31st, 2017. In January 2015, the Government of Quebec has implemented a system to buy allowances for all energy distributors and adjusted it quarterly. For your bulk propane purchases, this cost is included in your duties fees shown separately on your invoices.
If you need more information, please do not hesitate to call your local branch.