Final answer:
Separation authority for Expiration of Active Obligated Service (EAOS) is the command or personnel entity that manages the discharge of service members when their active duty term ends, following military regulations.
Step-by-step explanation:
The separation authority when separation by reason of Expiration of Active Obligated Service (EAOS) is typically a command or personnel action within the military organization which oversees the discharge or release of a service member at the end of their active duty commitment.
Separation due to EAOS is a standard administrative procedure that occurs when a service member's contractual period of active service, agreed upon at the time of enlistment or commissioning, comes to an end.
This administrative authority is governed by military regulations and policies which ensure that the process is carried out in accordance with statutory provisions and service-specific instructions.
The exact designation of the separation authority can vary between different branches of the military, but it is generally handled by personnel or command structures that are responsible for human resources or administrative affairs within the service member's respective military branch.