"They follow this quite closely," said Wenran Jiang, an energy expert and special adviser to Alberta's Department of Energy.
He said Canada's regulator hasn't put any major conditions on the approval.
"There are no major conditions such as changing the route" he said. "One major hurdle is over and there are many small battles ahead to win this thing."
___Associated Press writer Jeremy Hainsworth in Vancouver, British Columbia contributed to this report.