(1) The Tribunal must, at such intervals as are determined by the Chairperson, hold an inquiry to ascertain either or both of the following:
(a) whether the Commonwealth price of any or all pharmaceutical benefits should be varied;
(b) both:
(i) the kinds of supplies by approved pharmacists of pharmaceutical benefits (if any) that should be ACSS eligible supplies; and
(ii) the amount (which may be nil) of the ACSS payment for any or all ACSS eligible supplies, or the manner in which that amount is to be worked out.
(2) The holding of an inquiry under subsection (1) shall be by means of proceedings before the Tribunal.
(3) A person interested in the subject matter of an inquiry under subsection (1) may seek the leave of the Tribunal to appear, or be represented, in the proceedings before the Tribunal for the purpose of making a submission, or presenting evidence or other material, to the Tribunal.
(4) The Tribunal shall ensure that its findings resulting from its second or any subsequent inquiry, and the reasons for them, are issued not later than 12 months after the date on which the Tribunal issued its findings resulting from its first inquiry or from the last inquiry held by it, as the case may be.