In regards to PCMaternal.LastTime of Delivery,

The guidance states "In the case of multiple births, map the first delivery date/time (Baby A) as the delivery date/time for the encounter."

The specs state: PCMaternal.LastTimeOfDelivery(Encounter "Encounter, Performed")
Last(["Assessment, Performed": "Date and time of obstetric delivery"] TimeOfDelivery where Global."EarliestOf"(TimeOfDelivery.relevantDatetime, TimeOfDelivery.relevantPeriod)during "HospitalizationWithEDOBTriageObservation"(Encounter) and TimeOfDelivery.result as DateTime during "HospitalizationWithEDOBTriageObservation"(Encounter) sort by Global."EarliestOf"(relevantDatetime, relevantPeriod)).result as DateTime

The use of "Last", "Earliest of" & use baby 'A' (which would not be the last delivery D/T documented is confusing. 

Can you please clarify how these statements are to be used to determine which Delivery D/T is to be used in the case of multiple births?