Do you need a permit to sell your artwork on the pier in San Francisco? If so what's the cost?

Question

I always see people in the city selling their stuff on the streets do they need a permit from the city or can I just go out there and sell my stuff?

Answer 1

I know you need permits, because I've seen people without permits getting written up by the police (like the peruvians who used to be at front and market). I don't know what it takes to get a permit though.