TimestampUtc ::= TIME (SETTINGS "Basic=Date-Time Date=YMD Year=Basic Time=HMSF3 Local-or-UTC=Z")
TimestampTai ::= INTEGER { utcStartOf2004(0), oneMillisecAfterUTCStartOf2004(1) } -- number of elapsed milliseconds since 00:00:00 UTC January 1, 2004, including leap seconds