(a) UCAs shall contain definitization schedules that provide for definitization by the earlier of -

(1) The date that is 180 days after issuance of the action (this date may be extended but may not exceed the date that is 180 days after the contractor submits a definitization proposal); or

(2) The date on which the amount of funds paid to the contractor under the contract action is equal to more than 50 percent of the not-to-exceed price.

(b) Submission of a definitization proposal in accordance with the definitization schedule is a material element of the contract. If the contractor does not submit a timely definitization proposal, the contracting officer may suspend or reduce progress payments under FAR 32.503-6, or take other appropriate action.