4.0 Inspection, Verification and Buy Off 4.1 Certification 4.1.1 All Inspections must be performed with one of the following approved measurement system: 4.1.1.1 CMM 4.1.1.2 Manual CMM 4.1.1.3 Laser Tracker 4.1.1.4 Structured Light Inspection 4.1.2 Any measurement system used to certify the fixtures of gauges, must have a valid calibration awarded within the last 12 months. 4.1.3 All gauges and fixtures must be certified prior to shipping. 4.1.4 Re-certification after shipping must be performed at final location and signed off by TSL SIE or Dimensional Engineering. 4.1.5 When a gauge or fixture is removed from the primary location for any reason, the fixture must be re-certified upon return by an approved third party, unless there is CMM capability at the primary location.