How do I restrict a Governance user from creating/suspending/deleting a Sub-Account under a Control Account?

If you have a WACM account, log in to the platform here: https://wacm.wasabisys.com/en/wasabi/auth/login

A pre-requisite of this article is: What are the differences between Governance roles?

To restrict Sub-Account permissions for Governance Plus Admin/Staff/Viewers after they are created, an Admin-level user has to change the user in question's role to a non-Plus user role. 

Follow the same steps as seen here for a Control Account in Wasabi Account Control Manager to change a user role in Wasabi Account Control Manager's Account Governance feature:

https://wasabi-support.zendesk.com/hc/en-us/articles/4410210747035