(a) in the case of a heavier‑than‑air aircraft — the total time from the moment at which the aircraft first moves under its own power for the purpose of taking‑off until the moment at which it comes to rest after landing;
Does a skid (not wheel) equipped rotary taxiing count as having taken off?
Avconnection, you can't argue with the CAR 2 definition and an ops manual cannot change a legal definition, it can however add to safety requirements. Your duty time wouldn't be affected on any case, but I find it more likely CASA would look more unfavourably at logging taxi only time as command experience (say for claiming CAO 82 Para 4 time?).