; mobilization category. 20103. Members not on sustained duty: agreements concerning conditions of service. 20104. Orders to active duty: with consent of member. 20105. Sustained duty. 20106. Orders to active duty: without consent of member. 20107. Transfer to inactive status: initial service obligation not complete. 20108. Members of Space Force: credit for service for purposes of laws providing pay and benefits for members, dependents, and survivors. 20109. Policy for order to active duty based upon determination by Congress. 20101. Members in Space Force active status: amount of annual training or active duty service required Except as specifically provided in regulations prescribed by the Secretary of Defense, a member of the Space Force in a Space Force active status who is not serving on sustained duty shall be required to— (1) participate in at least 48 scheduled drills or training periods during each year and serve on active duty for not less than 14 days (exclusive of travel time) during each year; or (2) serve on active duty for not more than 30 days during each year. 20102. Individual ready guardians: designation; mobilization category (a) In general Under regulations prescribed by the Secretary of Defense, the Secretary of the Air Force may designate a member of the Space Force in a Space Force active status as an Individual Ready Guardian. (b) Mobilization category (1) In general Among members of the Space Force designated as Individual Ready Guardians, there is a category of members (referred to as a mobilization category ) who, as designated by the Secretary of the Air Force, are subject to being ordered to active duty without their consent in accordance with section 20106(a) of this title. (2) Limitations on placement in mobilization category A member designated as an Individual Ready Guardian may not be placed in the mobilization category referred to in paragraph (1) unless— (A) the member volunteers to be placed in that mobilization category