Harold hadn't really intended to end up with set rules in the way Carver and Bossie seem to think of them, but he's since deduced that Carver at least seems to find it reassuring rather than stifling, so in that sense it behooves him to be more authoritarian than he's usually comfortable with.

And the rules themselves are, of course, very telling of Harold's character.

"The first is that you are welcome to leave -- to break our affiliation -- at any time, but you must inform me of this before taking any action against myself, Mr. Reese, or Ms. Shaw."

Sometimes people end up enemies for authentic reasons. Harold doesn't expect a lifetime commitment, but he does expect them to refrain from outright betrayal.