The talk of “opt-out preference signals” or global privacy controls (GPC) has been increasing as companies dig into the forthcoming requirements under US “comprehensive” privacy laws. What is an opt-out preference signal? An “opt-out preference signal” also known colloquially as ”GPC,” is a signal sent by a platform or technology on behalf of a consumer that communicates the consumer’s choice to opt out of sale or sharing. Below, we summarize how each of the states treats this requirement.