off peak hot water. (NSW)

i recently got a defect notice about a house i did regarding the 250 litre hot water. the first defect was regarding 2 single 20amp breakers i had 1 for the booster one for the hot water (as/nz3000:2000 clause 2.9.4.5) , if i get a 2pole c/b will that rectify the problem?
the next defect is what is really confusing me it states that the connection of the booster element to the continuos supply at the off peak one tarrif is no longer permitted. ENERGY AUSTRALIA publication ES7 clause 6.5. im not sure what to do here would it be something in the off peak meter or something to do with my wiring.


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