How would countries with somewhat complex flag systems work? Like just an example is Iran. The recognized flag in the U.S. is the one that symbolizes the Islamic Republic, but several states ("stan"s) within the country insist on using either a) the pre-revolution flag that represents the crown, or b) the empirical flag that represents Zoroastrianism.
That's really good point.
I do do a bit of research on new flags added, as some countries have specific rules about vertical formats, etc. so I guess something like that would come up. And, I would
assume that anyone requesting such a flag would know how they work, and/or make it themselves. Its not really a situation we envisioned when we implemented this, so I guess the short answer is just "crossing that bridge when we come to it" ^^;