Cal. Health & Safety Code § 111345

Any drug or device is misbranded if any word, statement, or other information required by or under this part to appear on the label or labeling is not prominently placed on the label or labeling with conspicuousness, as compared with other words, statements, designs, or devices in the labeling, and in terms as to render it likely to be read and understood by the ordinary individual under customary conditions of purchase and use.