I think you need to get permits in advance.
Notice the Left never needs stinking permits, when they show up burn down the local Starbucks, attack ATM machines, smash windows at the near McDonalds and run rough shot in the streets with their so called rolling protests. Seems a permit is only a requirement, when Conservatives want to hold rallies.
At least once a month here in DC we have these rolling protest on Friday Nights, where the police are caught unaware, massive traffic jams, no one arrested or permits require & the elected officials (all Democrats)are eerily quite on the matter.
They don’t get permits; why should we?