Permission to Prevent CSRs/employees From Changing Tech Managed/Unmanaged Status

Tenants are running into issues where office employees are switching technician unmanaged statues to complete jobs due to the pop up that generates. This upsets management and owners that deal with billing because they're unknowingly being charged for additional managed technicians without being consulted first due to the pop up occurring and employees doing what they must to complete jobs. Tenants are looking for a permission or some feature that will prevent office employees from turning unmanaged techs to  managed.