48 C.F.R. § 22.101-3
22.101-3 Reporting labor disputes.
The office administering the contract shall report, in accordance with agency procedures, any potential or actual labor disputes that may interfere with performing any contracts under its cognizance. If a contract contains the clause at 52.222-1, Notice to the Government of Labor Disputes, the contractor also must report any actual or potential dispute that may delay contract performance.