If a pilot has basic currency to carry passengers in an aircraft requiring a type rating, say a Boeing 737, does that mean the pilot is also current in an aircraft in the same category and class (AMEL) that does not require a type rating, e.g. Diamond DA42?
61.57 has the caveat "If a type rating is required". So the question is whether that caveat means that the type is not relevant for considering currency in the DA42. Which would suggest that for the DA42 currency you need only consider flights in the same category and class so any flights in an AMEL (regardless of type) would count.