Almost every operator uses standard weights with the possible exception of oil rig choppers required by contract or regulations to use actual weights and those who will gain an advantage by weighing
Since the recommendation for standard weight for aircraft below 7 seats went out the window, (Para 11 CAAP 235-1(1)) all the OMs I have seen call for all pax and baggage to be weighed.
77 kg so 20th century. The minimum std weight for an adult male in an aircraft with 7-9 seats is 86kg reducing to 81.2 for aircraft with more that 500 seats.
Civil Aviation Safety Authority - CAAPs
I would be surprised if CASA went along with the use of 77kg these days
CASA will just point to the CAAP. End of story.