We instituted a policy a few years ago and the instances in which we may apply SE are
Non-reassuring FHT pattern
Absence of Previa (Ultrasound)
Physician preference for notification prior to application or after was included in the policy.
We also addressed the competency issue and the training issues. ie) year experience, Completion of FH Monitoring course (AWHONN) and 5 successful return demo's to TL or DR.
We use it a lot at night and most don't want to be bothered for permission, just if it validates non-reassuring FHT patterns.
We think it is a lifesaver.