Canada should strengthen protections for the marine environment around Vancouver to mitigate impacts from the Trans Mountain pipeline expansion, the country’s pipeline regulator proposed.

Natural Resources Minister Amarjeet Sohi said Jan. 11 he was examining the draft conditions and recommendations released by the National Energy Board for the publicly owned Trans Mountain project, which Ottawa is trying to get back on track after the courts halted it.

“This is an important step towards meeting the reasonable timeline that...