Flight detent.
If you are on a procedural approach and descend to a platform altitude then that is a minimum altitude for that proportion of the approach.
The ultimate responsibility for terrain clearance rests with the commander of the aircraft and all the documentation that I've read has been quite specific on the requirement to request a higher altitude if required to ensure terrain separation.
Further the documentation indicates that commanders should request a higher platform altitude in order to meet the profile requirements on a npa