COPE guidance on editorial board participation provides guidance on roles and responsibilities, participation on multiple boards, declarations of interest, and consideration during recruitment.
journals should clearly define the roles and responsibilities of their editor(s)-in-chief and all members of the editorial board.
journals should define what they consider the types or levels of conflicts of interest that are not permissible for their editors which, if present, should preclude an editor from joining the board or result in an editor’s removal if not resolved.
journals should ask potential editorial board members to provide a list of their potential conflicts of interest
when journals recruit editors at any level, they might need to decide whether it is appropriate for any individual to be a member of more than one editorial board at the same time.