Who defines responsibilities and authority of noncommissioned officers to their staffs and subordinates?

The responsibilities and authority of noncommissioned officers (NCOs) are typically defined by military regulations, chain of command directives, and specific service branch policies. These guidelines outline the roles and expectations for NCOs in leading, mentoring, and managing their subordinates. Additionally, individual commanders may provide further clarification based on mission requirements and unit dynamics. Ultimately, it is a combination of established doctrine and situational leadership that shapes an NCO's responsibilities and authority.