The F/O sits in the RHS and the PIC sits in the LHS.
LL I like you believed that to be the case but I have it on good authority that requirement isn't enshrined in law, rather it is a stipulation that some operator's choose to adopt as SOP and in their COMs.
Anyway for those of you interested there has been some additional submissions posted on the Senate website and a follow up statement from CASA in the additional information section
Here's the link:
Senate Committees – Parliament of Australia