Mariners are advised that for safety reasons, the Port of Montreal Administration has defined a zone between the northern extremity of Sainte-Hélène Island and section 55, near the entrance of the St. Lawrence Seaway, where commercial shipping (ships over 60 meters) will not be permitted to transit during all Loto- Québec firework events at La Ronde. For the upcoming firework events on July 1, 8, 15, 19, 22, 26, 29 and August 2, the no transit period will be from 21:30 to 23:00 hours for downbound ships and 21:30 to 23:30 for upbound ships in this zone. This could result in delays to downbound vessels in the South Shore canal close to this zone. Cruise and excursion ships as well as pleasure craft and emergency boats will be accepted in this zone.