Guys, it really doesn't have anything to do with Game Mechanics. It's all role play.
Roleplay is defined by game mechanics. Jens can claim anything he wants, but unless mechanics back him up, nobody's forced to believe him.
I can tell you now that if someone walked into Luria Nova with a history of sabotage against his own realm, who then started demanding we call him Lord, he'd be ridiculed and quite possibly told to bugger off.