A Canadian amateur radio operator is operating in the United States using voice. What form of identification is required?

Under the US-Canada reciprocal agreement, a Canadian operating in the United States must transmit their Canadian call sign first, followed by an indicator of their operating status ("portable" or "mobile"), and finally the US call area prefix they are visiting (e.g., W4 or W8). This format is the opposite of the CEPT convention. For example, a Canadian operating in Florida might identify as "VA3XXX portable W4". Distractors that place the US prefix first apply to European CEPT operations, not to the specific North American reciprocal treaty rules.