From LASORS :
H1.1 "All instructors shall unless specified otherwise: [...] have at least 15 hours experience as pilot on the
type or class of aeroplane on which instruction is
being given..."
wich is just a copy of JAR-FCL 2.310 :
"All instructors shall [...] have at leat 15 hours
experience as pilot on the type of helicopter on
which instruction is to be given,..."