Central Hudson Gas & Electric Corp. v. Public Service Commission of New York

In Central Hudson Gas & Electric Corporation v. Public Service Commission, the Supreme Court sets forth a four-part test for determining when commercial speech may or may not be regulated by states. The test states that: (1) the commercial speech must not be misleading or involve illegal activity; (2) the government interest advanced by the regulation must be substantial; (3) the regulation must directly advance the asserted government interest; and (4) the government regulation must not be more extensive than is necessary to serve the government interest at stake.