Gone are the days of 8 hours BTT.
Not not really. It has always been the case that the "eight hour rule" did not allow one to be "seriously smashed" and expect to fly eight hours later.
CIVIL AVIATION REGULATIONS 1988 - REG 256
Intoxicated persons not to act as pilots etc or be carried on aircraft
(1) A person shall not, while in a state of intoxication, enter any aircraft.
Penalty: 5 penalty units.
(2) A person acting as a member of the operating crew of an aircraft, or carried in the aircraft to act as a member of the operating crew, shall not, while so acting or carried, be in a state in which, by reason of his or her having consumed, used, or absorbed any alcoholic liquor, drug, pharmaceutical or medicinal preparation or other substance, his or her capacity so to act is impaired.
Penalty: 50 penalty units.
(3) A person shall not act as, or perform any duties or functions preparatory to acting as, a member of the operating crew of an aircraft if the person has, during the
period of 8 hours immediately preceding the departure of the aircraft consumed any alcoholic liquor.
Penalty: 50 penalty units.