REGULATING PSYCHOLOGISTS IN NOVA SCOTIA SINCE 1980

To answer your question, yes another suitable psychologist can be proposed even if they are not currently on the NSRP’s list of volunteer supervisors.

This request and the completed Supervisor’s Consent form and the Supervisor’s CV could be forwarded prior the approval if you like. The NSRP still must approve each supervision arrangement for a particular individual even if the potential supervisor’s name is on the list of volunteer supervisors

Reference: 
Supervisor not on volunteer supervisor list