Complex sentence: The two bailiwicks have been administered separately since the late 13th century; each has its own independent laws, elections, and representative bodies (although in modern times, politicians from the islands' legislatures are in regular contact).
Split into simpler sentences: The two bailiwicks have been administered separately since the late 13th century. Each has its own independent laws, elections, and representative bodies (although in modern times, politicians from the islands' legislatures are in regular contact).