This is the ValueSet that contains all the codes in BeVSPerformerTaskStatusReason (https://www.ehealth.fgov.be/standards/fhir/drp/ValueSet/be-vs-performer-task-status-reason) and BeVSPerformerTaskStatusReason (https://www.ehealth.fgov.be/standards/fhir/drp/ValueSet/be-vs-performer-task-status-reason). E.g. what you have to deal with if you get resources containing codes in either of them