what type of commercial speech is not protected by the 1st amendment
United States free speech exceptions Commercial speech occupies a unique role as a free speech exception. While there is no complete exception, legal advocates recognize it as having "diminished protection".[47] For example, false advertising can be punished and misleading advertising may be prohibited.[48] Commercial advertising may be restricted in ways that other speech can't if a substantial governmental interest is advanced, and that restriction supports that interest as well as not being overly broad.[49] This doctrine of limited protection for advertisements is due to a balancing inherent in the policy explanations for the rule, namely that other types of speech (for example, political) are much more important.[50]