Use the provision at FAR 52.203-18, Prohibition on Contracting with Entities That Require Certain Internal Confidentiality Agreements or Statements—Representation, and the clause at FAR 52.203-19, Prohibition on Requiring Certain Internal Confidentiality Agreements or Statements, prescribed at FAR 3.909-3 to implement section 883 of the National Defense Authorization Act for Fiscal Year 2021.