From page 15 of the report from the Article II Study Commission:
With Inspirations, we are aware that many value the current list of Sources. Nothing in what we propose contradicts this list. We felt a better use of the Bylaws would be to articulate what our inspirations do and how we should approach any source of inspiration. We tie them explicitly to our values and to the practices of cultural respect. If people feel an official list is necessary, we would suggest a process that includes theologians, ministers, religious educators, musicians, artists/writers and laypeople.
In my opinion, it does not require an amendment or any vote of the delegates to gather a group of people, as suggested by the report, and have them develop such a list. We would then need to develop a process to determine what would make it an “official” list and how it could be updated over time.