Von einem "current" ist nirgends etwas geschrieben.
Doch, leider schon. Aus EASA TIP-L (das ist das relevante Dokument, wenn es um FAA --> EASA geht):
1.1 Applicability and Conditions [...]
1.1.4 The FAA airman needs to be current in accordance with applicable FAA
regulations when the conversion process is initiated.
Und dann konkret für das Night Rating:
2.3 Night Rating – Eligibility Requirements [...]
(b) The absence of a night flying limitation on an FAA pilot certificate means
that the FAA has found the person qualified to operate an aircraft during the
time between the end of evening civil twilight and the beginning of morning
civil twilight [...]
2.3.3 Flight Training and Experience
(a) The applicant for the Part-FCL night rating must have fulfilled at least 5
hours of flight time in the airplane category at night, including:
(i) At least 3 hours of dual instruction, and
(ii) At least 1 hour of cross-country navigation with at least one dual crosscountry flight of at least 50 km (27 NM) and 5 solo take-offs and 5 solo
full-stop landings.
(b) The flight training and experience may be completed either in the FAA
system or in the EU Part-FCL system or in combination of both [...]
Auch Conversions auf Basis von 2020/723 oder (noch früher) Annex III zu Part-FCL haben zumindest bei den mir bekannten AA's immer eine FAA-Lizenz erfordert, die "current" ist. Die Umschreibung eines Night Ratings (das es ja bei der FAA gar nicht gibt) war dort allerdings gar nicht geregelt...