Currently, once a conservation status is added the authority (source) cannot be edited. To change the authority, the status has to be deleted, a new one created, and all of the fields reentered.
This might sound fairly uncommon, but it is especially frequent with statuses that don’t have sources to begin with. All other fields could be correct, but the entire status must be deleted to add a source.
This is particularly annoying for imported taxa that automatically take the status of their parent (common with extinct groups). This is a neat feature, but such statuses are rather unhelpful if they have to be deleted to add a source. Perhaps these statuses could take the source of the parent as well, but not the link (as that is easily added).
Probably worth adding to this wiki.