In such a case, you could establish a learning plan for ADHD assessments, and it would be okay for the owner to be the mentor of the learning plan, while you maintain your existing NSRP supervisor. For instructions on establishing a learning plan, please see page 21 of the existing Supervision Handbook:
https://www.ns-rp.ca/downloads/SupervisionHandbook.pdf
In this case, NSRP would ask that you ensure that the owner and NSRP supervisor have regular communication, so that the NSRP Supervisor has any information that may be required as part of the supervision process.