It’s illegal to “parade, stand or move in processions or assemblages” on the Supreme Court grounds or to display “a flag, banner or device” supporting a certain ideology there.

But what about performing an opera? No, not that, either.

Derrick Wang’s “Scalia/Ginsburg,” an opera about the unlikely friends and ideological opposites, premiered this month in Washington.

And it’s a good thing Wang has theater space, as it’d be unlikely an operatic “assemblage” would be sanctioned by the high court on its plaza.

Fix the Court believes that the justices, in the interest of being consistent with the First Amendment, should not prevent the public from congregating on the spacious plaza in front of the building – and they can allow such demonstrations without compromising their safety.