NAV Canada and Transport Canada REQUIRE that any structures above a certain height and within a certain distance of airfields or air traffic routes must have signal LIGHTS INSTALLED on the highest unmoving portion of their structure as a warning to local air traffic. This rule is the same for cell-phone towers, buildings, television and radio broadcast towers, WIND turbines, and more. Each wind energy PROJECT is required to apply to both NAV Canada and Transport Canada to determine whether they need flashing signal lights, and the government decides when these lights are required: they are not universally required, and they may or may not be needed in any given project.

NAV Canada and Transport Canada require that any structures above a certain height and within a certain distance of airfields or air traffic routes must have signal lights installed on the highest unmoving portion of their structure as a warning to local air traffic. This rule is the same for cell-phone towers, buildings, television and radio broadcast towers, wind turbines, and more. Each wind energy project is required to apply to both NAV Canada and Transport Canada to determine whether they need flashing signal lights, and the government decides when these lights are required: they are not universally required, and they may or may not be needed in any given project.