Further clarification from DJPR received

The advice provided via email yesterday afternoon, Saturday 20 September, in response to your questions about dance studios was in regards to professional dancers only, who are considered part of the Creative Studios sector. 

This advice only applies to the case where one dancer is using a studio by themselves.

Under the Roadmap for reopening, dance schools are included in the community sport and recreation sector and must adhere to the restrictions on indoor physical recreation facilities, outlined here for Regional Victoria and for Metropolitan Melbourne

All physical recreation facilities can open for outdoor activities only from the Third Step in regional Victoria. Participants can use indoor facilities (toilets, showers and change rooms).