In my Pilots logbook I log my piloting time as the time from the moment the aircraft commences its take-off until the time it completes the next landing (flight). Acording to my instruments, "the moment the aircraft commences its take-off" is defined as when, the engine rpm exceeds 5000 rpm and the airspeed exceeds 30 mph. "The time it completes the next landing" is defined as when the airspeed drops below 30 mph. Some pilots call this wheels-off to wheels-on time or brakes-off to brakes-on time?

For instance I wouldn't log any time for taxiing to the holding point, finding a fault and taxiing back to the hangar.

I also log every flight separately even if it was only for one circuit. I know when you have 1000’s of hours this is not important but what is correct? Also, if you do not have an instrument which calculates this for you how would you log piloting time, HOBBS minus avearge taxiing time e.g. 0.1 hours?
In my Airframe Logbook (aircraft/engine logbook) I log my instruments HOBBS reading as the “total time flown” which is defined as when the engine rpm exceeds 2000 rpm until it drops below 2000 rpm. I know some pilots who log this as their piloting time in their Pilots Logbook? Some define this “time flown” entry, as the time period between the moment the aircraft moves under its own power until it comes to rest at the end of the flight (flight time). Chocks-off to chocks-on time

However, I do not log the time pushing the aircraft out of the hangar.
What does RAASA and CAA require and where can I find this definition.