Granting a waiver to prevent a member from being separated for a second alcohol-related incident falls under which authority?

The correct answer relates to the authority of the Naval Personnel Command. This organization is responsible for managing personnel issues within the Navy, including the administration of waivers for alcohol-related incidents. When a member faces potential separation due to a second alcohol-related incident, the Naval Personnel Command has the authority to review cases and determine whether a waiver can be granted, allowing the member to remain in service under specific conditions.

This process involves evaluating the circumstances of the incidents, the member's overall service record, and their potential for rehabilitation. The decision must align with the Navy's policies on substance abuse and personnel management, which the Naval Personnel Command oversees.

Other authorities mentioned may deal with broader strategic or operational functions within the Navy but are not typically involved in the specifics of personnel actions like waivers associated with alcohol incidents.