Go to the listed coordinates where you will find some information that will lead you to the final coordinates which are at:
S41 3A.BCD E173 5E.FGH where:
A = Harcourts (Upper)
B = Marcus Zintel
C = Crombie Lockwood
D = SASS
E = Sum of the upper and lower barristers
F = SASS + Rangitane o Wairau
G = Burkhart Group
H = Bryony Millar - Ngai Tahu Seafood
Now go to GZ for a QEF PnG.
The item with the information on it to work out the final coordinates is a 'living' document and may change without warning, you will see why when you find it. If you suspect the information may have changed, let the CO know and he will check and confirm for you.