Transfer ownership of Rise course to someone on another Articulate 360 team--is that possible?

I need to transfer a Rise module to a client for them to make edits in the future. I imagine the easiest way to do this would be to add them as a collaborator and then transfer ownership of the course to them, but the client would have their own Articulate 360 Team that's separate from my own.

How can I most easily transfer ownership to them? Or, must they rebuild the whole module in their own Rise account? 

Thanks in advance,

Ashley