I would say at the license/permit agency downtown /city hall. Make a call and ask the general information desk they can point you to the right office for street perfomers licenses/permits. This is the fastest way I know to get the information you need. They will also probaly tell you about their government site. Where you can read and download information and maybe even the forms you need to fill out in order to be processed faster. You can also find out what you will need to get a permit/license. Just my opinion.
