Federal Acquisition Regulation
Assignment of criticality designator
FAR 42.1105
Contracting officers shall assign a criticality designator to each contract in the space for designating the contract administration office, as follows: Criticality Designator Criterion A Critical contracts, including DX-rated contracts (see subpart Priorities and Allocations (FAR 11.6) ), contracts citing the authority in 6.302-2 (unusual and compelling urgency), and contracts for major systems. B Contracts (other than those designated "A") for items needed to maintain a Government or contractor production or repair line, to preclude out-of-stock conditions or to meet user needs for nonstock items. C All contracts other than those designated "A" or "B."