Nobody should be able to arrest you on a Darkness planet because nobody has arrest permissions there outside of the Darkness (admin) faction. It doesn't matter if they are a member of your faction because your faction doesn't have a/e permissions on Darkness worlds.
It is the intended functionality of IF A/E to not care about location, since location is only relevant to the arrest permissions of an entire faction with regard to other factions in the galaxy. I don't recall this ever not being the case, either. Reading over the rules, I did not spot any contradictions, although after the first bullet point they just seem to focus on OOF A/E entirely (probably because that's the complicated one).
I suppose the first bullet point could be pointedly amended to include something like "this can be performed regardless of location" although I don't recall this even being a point of confusion previously. Feel free to post a suggestion in rules updates if you would prefer different phrasing and I'm sure someone will revise it for you.