A Canadian amateur radio operator, operating their station 7 kilometres offshore from the coast of Florida, is subject to which frequency band limits?

The sovereignty of a nation extends beyond its landmass into its adjacent coastal waters, known as territorial waters. These waters generally extend up to 12 nautical miles (roughly 22.2 kilometres) from the shoreline. Since a distance of 7 kilometres offshore is well within the territorial waters of the United States, you are legally operating within US jurisdiction. As a result, you must comply with the rules and frequency band limits applicable to United States amateur radio operators. Options suggesting Canadian or general ITU rules apply are incorrect because local national laws always take precedence within territorial boundaries.