What aspect of advertising may not be regulated by the board?

The aspect of advertising that may not be regulated by the board is personal testimony in an advertisement. Personal testimony refers to the experiences or opinions shared by individuals regarding a product or service. This type of content is often subjective and can vary greatly between individuals, making it challenging for a regulatory board to set strict guidelines around it.

Regulations typically focus on aspects that can be quantified or standardized, such as the size of an advertisement, the duration it runs, or the medium through which it is delivered. These elements can be easily measured and controlled to ensure compliance with advertising standards and laws. Personal testimony, on the other hand, reflects personal experience and is not as easily regulated since it encompasses a wide range of individual responses and can take different forms, which may include subjective opinions or benign endorsements.

Thus, while the board may set standards to prevent misleading claims or ensure advertisements are not deceptive, the nature of personal testimony makes it more difficult to impose tight regulations on this aspect of advertising.