The way I understand their wording is that the GCAA is now separating
flight time cumulative limits and Flight Duty Period Time for cumulative limits consideration.
Meaning that you only get stick time credit towards your flight time limits
(100 hrs per month and 900 per year)
within the boundaries of the following duty periods (The maximum cumulative duty hours for Flight crew of an aeroplane shall not exceed blah blah blah)
Cumulative duty hours includes bunk and stick time. Cumulative flight time is just stick time towards absolute flying hours.
Soon we will have to subtract time in the toilet as well, please make a note on the VR.