CAAP 235-1 probably means that the legal reference to which it relates is CAR 235.
An operator using standard weights may be required to do an average passenger weight review every couple of years. People are getting heavier.
I remember being required to do this for a B737 operation. The only way to get the ladies on to the scales was to tell them to step aboard with their hand baggage (which they could then blame for the high readings). Including carry-on baggage was of course quite relevant to the standard weight allowance, and the results were quite surprising. The average adult female with her carry-on bags came to about 91 kg and the blokes with their clobber were only about 4 kg more.