VFR Aircraft operating beyond 50 NM from the departure point by day, and all aircraft operating
at night, are required to carry suffcient fuel to allow for the possibility of arriving in the vicinity
of the destination aerodrome and then finding it impossible to land due to weather. Sufficient
fuel must be carried to proceed to a suitable alternate aerodrome, with all normal reserves, or in
some cases to hold for a specifed period of time, depending on the conditions described in the
aerodrome forecast
The AIP references in that book (2014) are out of date as there was major changes to the AIP in March 2017 the correct references are
AIP ENR 1.1 para 11.8.2.1 to 11.8.2.11
As you have such an old copy I encourage you to use this link to see all the changes that have been made
www.bobtait.com.au/updates-and-errata/25-ppl-errata
Cheers
Stuart