Although the Trust security label codes and valueset were approved in 2014, the SecurityTrustMechanismObservationValue (TRSTMECOBV), which is abstract, was not implemented correctly. Will fix when UTG is operational. TRSTMECOBV is defined as Values for security metadata observation made about a security architecture system component that supports enforcement of security policies. For example, Digital signature, authorization scheme, and certificate token. The IG tooling will not permit fixing or removing this abstract code or adding any editorial corrections in the valueset resource. We can add a warning to readers that this is an error on our to do list.