Contracts for Maintenance, Calibration, or Repair of Certain Equipment—Requirements (May 2014) (41 U.S.C. chapter 67). (6) 57 779-53, &caption fro Application of the Service Contract Labor Standards to Contracts for Certain Services— Reqtirements (May 2014) (41 US.C. chapter 67). (7) 52-779-55, Minimu ges Under Exccuti c Order 13658 (Dec 2015).