clearly states that you cannot go beyond 25nm from your home/training organisation aerodrome,
but in fact states:
authorised to pilot an aircraft outside the following areas only if the holder also holds a recreational navigational endorsement
(a) the area within a 25 nautical miles of the departure aerodrome
"to pilot" is quite a broad activity which can be determined from the regs. "departure aerodrome" seems like a fairly simple concept but who knows with CASA.