48 C.F.R. § 270.103 – Limitations.

(a) Participation in the pilot program is subject to approval by the Under Secretary of Defense (Acquisition and Sustainment), Office of the Principal Director, Defense Pricing, Contracting, and Acquisition Policy (Contract Policy). Only a contracting officer may submit an application to participate in the pilot program. See PGI 270.104(a).
(b) Contracting officers shall only award—
1. (1) One sole-source, follow-on contract per predecessor contract to the incumbent contractor unless waived by the head of the contracting activity, delegable to a level no lower than one level above the contracting officer;
2. (2) Contracts to qualified businesses that have a minimum performance rating of satisfactory for the predecessor contract in the Contractor Performance Assessment Reporting System (see FAR subpart 42.15); and
3. (3) Contracts to qualified businesses that have certified they will not pay more than 50 percent of the amount paid by the Government for contract performance to subcontractors that are not qualified businesses, except for subcontracts for materials not available from another qualified business when the contract is for products, unless waived by the head of the contracting activity, delegable to a level no lower than one level above the contracting officer.