A public office holder who holds an office that has had remuneration determined for it by the Tribunal has a legal entitlement to that remuneration, unless specifically excluded in legislation from receiving payment (e.g. a full-time Australian Public Service employee). It is the Tribunal's understanding that generally an office holder would not be able to give a legally binding waiver of their entitlement to remuneration.
How the fee determined by the Tribunal for an office is paid is a matter between the paying agency and the office holder.
Any taxation withholding obligation must be met from the fee payable in respect of the office. If the payer is not certain how the office holder's preferred method of payment affects taxation obligations, they should seek the advice of the Australian Taxation Office.