I'm not sure I'm completely following. In general though, the restrictions we have listed per resource on
fhir.cerner.com are going to apply overall, and, as long as a client has been onboarded to the Ignite APIs correctly you, as an app developer, will not find that a field is required in one domain that is not required in another (or vice versa). Our restrictions for required fields on creates will apply regardless of the domain you are on.