Canada’s largest province approved rules last month enabling it to link its carbon market with the one launched in California at the start of the year, but with the province waiting until May to hand out allowances, trading is expected to take months to ramp up.

The owners of the 80 large facilities facing mandatory limits on their greenhouse gas output will not try to get a head-start in early trade the way California did before the official launch, experts said.

“For Quebec, linking is a necessary step (for emitters) to start trading. They are waiting for definitive certainty,” said Jeff King, head of environmental markets at Scotia Bank.