On March 31, 2008, a Notice of Violation was issued for a Severity Level III violation involving the failure to use a minimum of two independent physical controls that form tangible barriers to secure portable gauges from unauthorized removal, when portable gauge was not under the control and constant surveillance of the licensee. Specifically, licensee personnel secured the transport case containing a gauge to a vehicle with two independent cables and padlocks, but the gauge case lid was secured with only a padlock and the gauge was stolen from the vehicle.