This is the ValueSet that contains all the codes in ActEncounterCode - AU Extended (http://terminology.hl7.org.au/ValueSet/v3-ActEncounterCode-extended) and ActEncounterCode - AU Extended (http://terminology.hl7.org.au/ValueSet/v3-ActEncounterCode-extended). E.g. what you have to deal with if you get resources containing codes in either of them