I've just had what I thought would be a quick look through the ICU Constitution and have ended up reading half a dozen policies and codes of practice that it referred to. My quick summary of what seems to be the case is:

- The ICU President is the Felix Editor's line manager, but not in respect of matters of editorial freedom.
- Felix is governed by the Press Code of Conduct (which does not actually say much on this sort of thing, surprisingly).
- A Union General Meeting can call the Felix Editor to account.
- The ICU Court can discipline the Felix Editor.

The question, I would say, is whether priniting very offensive and quite possibly unlawful (see penguineggs' comment) is an 'editorial freedom' matter. The constitution clearly provides for the Editor to be held accountable, so implying that some content matters do not fall within the carve-out of 'editorial freedom'.