Even if there were such laws in the anime/manga that prevents M.O.N. and government agents from being hosts, my previous point of 'we're here to have fun. Not follow the source material to the letter.' still applies. We could do away with whatever aspects that don't suit our purposes if need be.<br/><br/>Though, in the case of a M.O.N. agent acting as host to a monster, a certain amount of leniency for some of the rules needs to be applied. Specifically the rule that a monster must be supervised by their host at all times (or at least be in the same building.) It wouldn't serve the purposes of the program, or M.O.N. to force agents to drag their innocent guests along on dangerous missions.