153,648
Pretty sure Mehrunes Dagon's word is the law over there.
And seeing as he's the lord of destruction and revolution, I'd imagine it to be quite different from the laws of Tamriel proper.
I also don't think he's got an extradition agreement in place with Cyrodiil, meaning that Cyrodilic law enforcers have no right to arrest you there.
Unless they take the law into their own hands, but then they're criminal scum.