Some of the most active companies traded Tuesday on the Toronto Stock Exchange:Toronto Stock Exchange (15,816.90, up 14.20 points):Bombardier Inc. (TSX:BBD.B). Aerospace, rail equipment. Up 37 cents, or 15.68 per cent, to $2.73 on 59.3 million shares. The Montreal-based company believes it is on strong legal ground to avoid import duties for its CSeries commercial jets by setting up a second assembly line at Airbus’ plant in Alabama. Bombardier has a legal opinion that no duties can apply because half the parts, starting with the engines, and the final assembly for U.S. customers are American, according to a source.Aphria Inc. (TSX:APH). Healthcare. Down $1.06, or 13.38 per cent, to $6.86 on 9.9 million shares. Licensed marijuana producer stocks are down in a sector-wide selloff a day after the Toronto Stock Exchange said firms with cannabis-related business activities that violate U.S. federal law could face delisting.Aurora Cannabis Inc. (TSX:ACB). Healthcare. Down 11 cents, or 3.82 per cent, to $2.77 on 7.1 million shares.Canopy Growth Corp. (TSX:WEED). Healthcare. Down 61 cents, or 4.65 per cent, to $12.52 on 6.9 million shares.IC Potash Corp. (TSX:ICP). Agriculture. Up one cent, or 66.67 per cent, to 2.5 cents on 4.9 million shares.Trevali Mining Corp. (TSX:TV). Miner. Down nine cents, 5.73 per cent, to $1.48 on 4.4 million shares.