10 May Helpline Q&A Commissioning a report from a third party expert on one of the issues the Expert Witness has been instructed to consider Report drafting, Expert opinion, Limits of expert opinion, 05. Rules and Regulations, 10. Report Writing, 06. Receiving Instructions, 07. Working with Instructing Parties Is it acceptable for an Expert Witness to commission a report from a third party expert on one of the issues the Expert Witness has been instructed on and then use the third party expert opinion in their report?