EASA basic regulation Art 3(j)
‘complex motor-powered aircraft’ shall mean:
(i) an aeroplane:
with a maximum certificated take-off mass exceeding
5 700 kg, or
certificated for a maximum passenger seating configuration
of more than nineteen, or
certificated for operation with a minimum crew of at least
two pilots, or
equipped with (a) turbojet engine(s) or more than one
turboprop engine, or
(ii) a helicopter certificated:
for a maximum take-off mass exceeding 3 175 kg, or
for a maximum passenger seating configuration of more
than nine, or
for operation with a minimum crew of at least two pilots,
or
(iii) a tilt rotor aircraft;
Well done Cobalt. Making it up indeed!
Further EASA definitions are found in Annex I to EU regulations for operators and in this respect I have some sympathy for Genghis as EASA were 'forced' by the commission to spread definitions across several documents after intervention by two large EU states. Not ideal.
Posting regulatory advice based on assumption is a little shabby.