I had a call and this is the question. If someone from NS gets an ADHD Assessment completed in Ontario (she is going there for holidays), by a psychologist there, would this assessment be recognized by a psychologist in NS for referral etc.

I have consulted on your enquiry. The institution or healthcare professional In NS would have professional discretion to review a prior assessment as there may be other considerations, depending on the breadth of the assessment this is completed in ON and/or whether the healthcare professional in NS feels there are other factors to be considered.