Not sure if there is any such legislation/law.
It sounds you are not a business girl.
What is the cost of a plastic bag? Take a guess, for Ikea, how much money does it collect on plastic bags at the price of $0.05/each in a month across Canada?
Grocery stores can collect much more than Ikea stores, for sure. Keep in mind that this is extra money on top of their net profit.
Ontarians used more than four billion single-use plastic shopping bags in 2007. That would equal $0.05 x 4,000,000,000 = $200,000,000. Correct?
I would fully support a legislation outlawing plastic bags/sheets to be used for shopping and packaging purposes.