Section 28 of the Principal Act is amended as follows:

(a) by omitting from subsection (6) " subsection (5) " and substituting "subsection (4)" ;

(b) by inserting the following paragraph after paragraph (b) in subsection (8) :

(ba) prescribe the procedures for hearing and determining a matter referred to the Tribunal, including the manner in which the Tribunal may inform itself in respect of such a matter; and

(c) by omitting subparagraph (ii) from subsection (8)(c) and substituting the following subparagraph:

(ii) the determination, apportionment, payment and other matters relating to the amount of costs to be paid by a party to a reference to the Tribunal; and

(d) by inserting the following subsection after subsection (8) :

(9)  A determination of the Tribunal under this section, or an order as to costs made by the Tribunal in respect of a determination under this section, made before the commencement of the Motor Accidents (Liabilities and Compensation) Amendment Act 2019 , is declared to be as valid as it would have been if the amendments effected by that Act had been in force at the time when the determination or order was made.