Does anyone know if the laws that require tobacco companies, for instance, to place health warnings on cigarette boxes also specify the appearance of the label

Does anyone know if the laws that require tobacco companies, for instance, to place health warnings on cigarette boxes also specify the appearance of the label (e.g., font family or size). If not, this article seems to suggest that companies should seek out typography, such as comic sans, that would lessen the negative effects of such labels.