IOM accepts FAA and EASA licenses with one exception FAA SIC are not valid under the CAA Overseas territory of which the IOM follows so to act even as SIC you have to have a Current Type rating with PIC qualification, this is applicable for all aircraft which require 2 crew members to operate.
Rusty
Think the IOM had that stance but have now changed it. Spoke with them directly and an SIC is good!
Pace