Change roles of regulatory change reviews
You can change the hierarchy owner role only if the regulatory change review has the status New or In progress. The auditor role can be changed independently of the object status.
Prerequisites
The change of roles assigned to tasks is enabled in Risk and Compliance configuration of ARIS Administration (General workflow).
You have the Hierarchy manager role.
To change an assignment, open the respective object and click 
Assign or 
Remove under Roles responsible in the row of the relevant role.