(1) The Governor - General may make regulations prescribing matters:
(a) required or permitted by this Act to be prescribed; or
(b) necessary or convenient to be prescribed for carrying out or giving effect to this Act.
(2) Regulations providing for allowances and expenses for the purposes of section 89 or subsection 192(6) or 218(4) may provide for those allowances and expenses by reference to a scale of expenses for witnesses who attend before a court specified in the regulations, being a federal court, or the Supreme Court of a State or Territory.