Maitland has no awis, only info gained from Taf/area fcst
Where instrument approach charts are identified by a shaded
background to either the minima titles for IAL plates or the published
minima for DME or GPS arrival procedures, landing, circling
and alternate minima have been calculated assuming the use of
forecast terminal QNH. These minima may be reduced by 100FT
whenever an actual aerodrome QNH is set. Approved sources of
actual QNH are ATC, ATIS, AWIS and CASA-approved meteorological
observers. An actual aerodrome QNH obtained from an
approved source is valid for a period of 15 minutes from the time of
receipt (Note: METAR QNH does not meet this requirement).