AIP ENR 1.5 Ss 5 Application of Aerodrome Meteorological Minima
5.3 QNH Sources
5.3.1 Prior to passing the IAF, pilots are required to set either:
a. the
actual aerodrome QNH from an approved source
(-100')
b. The forecast Terminal QNH
(minima as published), or
c. the forecast area QNH
(add 50')
That's all there is to it, mate.
