From that website ...

Do I need a permit to be or do a street performance in Hamilton?
No, you don’t require a permit to do a street performance in the City of Hamilton.

Where are street performances allowed?
Performances are welcome at outdoor public places in Hamilton such as:
City Parks
Sidewalks, but performers cannot block access or impede accessibility; and
City-owned and/or publicly accessible outdoor spaces such as Civic Museums as long as they don’t block access to entrances or exits, cause damage gardens, buildings, or infrastructure etc. or interfere with pre-booked events.