32 CFR 104.3 - Definitions.
Unless otherwise noted, the following terms and their definitions are for the purposes of this part.
Critical mission. An operational mission that requires the skills or resources available in a Reserve Component or components.
Critical requirement. A requirement in which the incumbent possesses unique knowledge, extensive experience, and specialty skill training to successfully fulfill the duties or responsibilities in support of the mission and operation or exercise. Also, a requirement in which the incumbent must gain the necessary experience to qualify for key senior leadership positions within his or her Reserve Component.
Military necessity. For the purpose of determining when providing advance notice of uniformed service is not required, a mission, operation, exercise, or requirement that is classified, or a pending or ongoing mission, operation, exercise, or requirement that may be compromised or otherwise adversely affected by public knowledge is sufficient justification for not providing advance notice to an employer.
Officer. For determining those Service officials authorized to provide advance notice to a civilian employer of pending uniformed service by a Service member or an individual who has applied for uniformed service, an officer will include all commissioned officers, warrant officers, and non-commissioned officers authorized by the Secretary concerned to act in this capacity.
Uniformed services. The Armed Forces, the Army National Guard and the Air National Guard when engaged in active duty for training, inactive duty training, or full-time National Guard duty, and any other category of persons designated by the President in time of war or National emergency. (See 38 U.S.C. chapter 4303.) The National Disaster Medical Response System and the Commissioned Corps of the Public Health Service are not governed by this Rule and are therefore excluded from its definition of uniformed services. However, their Service members and applicable employees remain protected under Title 38 U.S.C. Chapter 43 and its definition of Uniformed Services.