7.18 An expert witness must abide by any direction of a DRS decision-maker to:
(a) attend a conclave or conference with any other expert witness
(b) endeavour to reach agreement on any matters in issue
(c) prepare a joint report, specifying matters agreed and matters not agreed and reasons for any disagreement
(d) base any joint report on specified facts or assumptions of fact
(e) give evidence concurrently with other experts.
7.19 An expert witness must exercise his or her independent, professional judgment regarding such a conclave or conference and joint report and must not act on any instruction or request to withhold or avoid agreement.