Category:
Registrant
To answer your question, in this case, our understanding is exactly the same as yours that the Yukon, is one Canadian jurisdiction where there is no regulatory body in psychology to seek authorization from. You would not be prevented from providing service to this client.
Like all situations involving telepsychology, we would refer you to the NSRP standards for telepsychology.
Reference:
Telepsychology service in Yukon.