Dear Convert:

We make every effort here to ensure that obeying the government is in everyone's own interest.  Set aside your natural Lawfulness and look around you for the many reasons we've set in place to ensure that following orders is in his own selfish interest.  If you can get him Evil first, that should get him Lawful enough from there.  Sufficient Law to stay out of trouble and go to Hell is Lawful enough for Cheliax.

Dear Convert:

We make every effort here to ensure that obeying the government is in everyone's own interest.  Set aside your natural Lawfulness and look around you for the many reasons we've set in place to ensure that following orders is in his own selfish interest.  If you can get him Evil first, that should get him Lawful enough from there.  Sufficient Law to stay out of trouble and go to Hell is Lawful enough for Cheliax.

If that's not working well enough on its own, secretly turn him for minor crimes and let him get whipped over those until the benefit of Lawfulness starts to sink into his brain.  Though, do make sure first that he's not in a mental state where he'd just leave Cheliax if that happened.

Dear Convert:

We make every effort here to ensure that obeying the government is in everyone's own interest.  Set aside your natural Lawfulness and look around you for the many reasons we've set in place to ensure that following orders is in his own selfish interest.  If you can get him Evil first, that should get him Lawful enough from there.  Sufficient Law to stay out of trouble and go to Hell is Lawful enough for Cheliax.

If that's not working well enough on its own, secretly turn him in for a minor crime or two, that wasn't even worth it to him really, and let him get whipped over those, until the benefit of Lawfulness starts to sink into his brain.  Though, do make sure first that he's not in a mental state where he'd just leave Cheliax if that happened.

Dear Convert:

We make every effort here to ensure that obeying the government is in everyone's own interest.  Set aside your natural Lawfulness and look around you for the many reasons we've set in place to ensure that following orders is in his own selfish interest.  If you can get him Evil first, that should get him Lawful enough from there.  Sufficient Law to stay out of trouble and go to Hell is Lawful enough for Cheliax.

Or are you not inside Cheliax?  In this case, you might have to act as the agent for a more immediate and visible form of punishment than would otherwise be inevitable for him later - when he's being unLawful, stay on the lookout for ways to sabotage his plans, that would look like his plans failed due to his transgression against Law.  Just be sure not to get caught!

Dear Convert:

We make every effort here to ensure that obeying the government is in everyone's own interest.  Set aside your natural Lawfulness and look around you for the many reasons we've set in place to ensure that following orders is in his own selfish interest.  If you can get him Evil first, that should get him Lawful enough from there.  Sufficient Law to stay out of trouble and go to Hell is Lawful enough for Cheliax.

Or are you not inside Cheliax?  In this case, you might have to act as the agent for a more immediate and visible form of punishment than would otherwise be inevitable for him later - when he's being unLawful, watch for ways to sabotage his plans, that would seem like his plans failed due to his transgression against Law.  Just be sure not to get caught!