...within the 12 months before the expiry date of the rating, complete 12 hours of flight time in the relevant class, including:
6 hours as PIC;
12 take-offs and 12 landings; and
a training flight of at least 1 hour with a flight instructor (FI) or a class rating instructor (CRI).
I remember, when this wording was introduced, thinking that an interesting question with regard to the meaning of the phrase 'flight time' could be raised, and this is the first time since then I have seen it brought up.
In theory, as it does not specify what form the 'flight time' that is
not PIC must take, one could log passenger time, without claiming any crew function, as 'flight time'.
MJ