PGI 206.302 Circumstances permitting other than full and open competition.
(b) Application. The circumstances under which use of this authority may be appropriate include, but are not limited to, the following:
(i) Supplies, services, or construction needed at once because of fire, flood, explosion, or other disaster.
(ii) Essential equipment or repair needed at once to-
(A) Comply with orders for a ship;
(B) Perform the operational mission of an aircraft; or
(C) Preclude impairment of launch capabilities or mission performance of missiles or missile support equipment.
(iii) Construction needed at once to preserve a structure or its contents from damage.
(iv) Purchase requests citing an issue priority designator under DoD 4140.1-R, DoD Materiel Management Regulation, of 4 or higher, or citing "Electronic Warfare QRC Priority."