(a) UCAs shall contain definitization schedules that provide for definitization by the earlier of—
(1) The date that is 180 days after the contractor submits a qualifying proposal. This date may not be extended beyond an additional 90 days without a written determination by the head of the contracting activity without power of redelegation, the commander of the combatant command concerned, or the Under Secretary of Defense for Acquisition and Sustainment that it is in the best interests of the military department or the defense agency, the combatant command, or the Department of Defense, respectively, to continue the action; or
(2) The date on which the amount of funds obligated under the contract action is equal to more than 50 percent of the not-to-exceed price.
(b) Submission of a qualifying proposal in accordance with the definitization schedule is a material element of the contract. If the contractor does not submit a timely qualifying proposal, the contracting officer may suspend or reduce progress payments under FAR 32.503-6, or take other appropriate action.