I (Mar 2015) of 52.222-50 (22 U.S.C. chapter 78 and E.0 13627). (xi )52.222-51, Exemption fro Application of the Service Camera Labor Stan lards to Contracts for Maintenance, Calibration, or Repair of Certain Equipment-Requimments (May 2014) (41 US.C. chapter 67). (xv) 52.222-53, Exemption from Application of the Service Camact Labo