The nudists' attorney, Christina DiEdoardo, told SF Weekly that if naked people were cited today for "exercising their free speech" (aka being naked), then that would be enough to take this case back to court on the basis of discrimination.
"The [judge's] order gave an implicit invitation to refile the case if there are instances of discrimination," she said on Tuesday.
Eh, not a terrifically strong case, I'm afraid. The city will argue that this is a permissible "time, place, or manner" restriction (for example, the city could prohibit rallies in front of hospitals in order to preserve the peace and quiet for those recuperating inside — so long as the restriction was viewpoint neutral; that is, so long as it was applied equally and not applied on the basis of the content of the speech).
Ward v. Rock Against Racism, 491 U.S. 781 (1989) ("Our cases make clear, however, that even in a public forum the government may impose reasonable restrictions on the time, place, or manner of protected speech, provided the restrictions 'are justified without reference to the content of the regulated speech, that they are narrowly tailored to serve a significant governmental interest, and that they leave open ample alternative channels for communication of the information.'").
Here the city will argue that that there was no viewpoint discrimination. Anyone nude was liable to ticketing, regardless of the viewpoint on behalf of which the nudity was used.
The four elements are:
* The restrictions are reasonable and pertain to the time, place, or manner of the speech
* The restrictions are not applied differently according to the content of the speech; all speech must conform to the TPM restrictions
* There is a significant governmental interest at stake (and the court will find that nudity falls under public morals, which is accepted as a significant governmental interest)
* The restrictions are narrowly tailored and leave open ample alternative channels for imparting the viewpoint to the public
Of these, the last one might be the best grounds for challenge.