From Wednesday’s New Hampshire Supreme Court opinion in Montenegro v. N.H. Div. of Motor Vehicles (N.H. May 7, 2014):

The challenged portion of the regulation prohibits vanity registration plates that “a reasonable person would find offensive to good taste.” The phrase “offensive to good taste” is not defined in the regulation. Further, to the extent the phrase could be construed to prohibit obscene material, we note that a separate provision in the regulation prohibits vanity registration plates that are “capable of an obscene interpretation.” …

Taken together, [the dictionary definitions of the words in the regulation] lead to various potential interpretations of the phrase “offensive to good taste.” For example, one such interpretation could be that no vanity registration plates are allowed that are “insulting to the standard of morality or virtue of individual preference.” This reading alone demonstrates the arbitrariness of determining whether a vanity registration plate is “offensive to good taste.”

We acknowledge that the phrase “offensive to good taste” is modified by the “reasonable person” standard. However, this modifier fails to provide sufficient guidance to DMV officials in determining which vanity registration plates shall be authorized. “Reasonable people frequently come to different conclusions.” Indeed, speech that one reasonable person finds “offensive to good taste” may not be offensive to the good taste of another reasonable person.

To the extent the DMV argues that its reasoning for denying the petitioner’s requested vanity registration plate [COPSLIE] in this case aids in interpreting the phrase “offensive to good taste,” we disagree. The DMV initially denied the petitioner’s request because several DMV employees believed the text to be “insulting.” The DMV then argued that the phrase was applied “to exclude … accusation[s] of moral turpitude.” We are not persuaded that these interpretations clarify or explain the meaning of “offensive to good taste” so as to render it constitutionally sufficient. Moreover, we question whether prohibition of accusations of moral turpitude would constitute “viewpoint-neutral” regulation. Regardless, in order to construe the phrase to avoid unfettered discretion in enforcement, we would have to add or delete text to the regulation. This we decline to do….

The DMV further maintains that “the concept of vagueness is inapplicable” in this case because the disputed language “is not a prohibition on the [petitioner’s] conduct but rather a standard by which State employees are to discharge their duties.” As explained above, a regulation may be invalidated as unconstitutionally vague when “it authorizes or even encourages arbitrary and discriminatory enforcement.” The challenged restriction … does just that. As a result, it is precisely the type of restriction that the vagueness doctrine serves to protect against.

Thanks to  Josh Blackman, an assistant professor at the South Texas College of Law, for the pointer.