The U.S. International Trade Commission has voted to move ahead with a series of costly duties against Canadian mills that produce glossy paper products.

The decision, posted today on the commission’s website, was part of the final phase of a countervailing duty investigation concerning supercalendered paper.

Under a decision released last month the U.S. said it would impose duties ranging from 17.87 to 20.18 per cent against Canadian mills.

The trade action is the result of a petition filed by two American producers of supercalendered paper that say the Canadian paper goods are unfairly subsidized.

Nova Scotia mill Port Hawkesbury Paper faces a 20.18 per cent duty under the ruling.

Nova Scotia’s Trade Minister Michel Samson says the province will work with Ottawa to advance a challenge of the U.S. ruling under the North American Free Trade Agreement.