I'm very confused about that myself; it doesn't sound like there's anything like perjury or obstruction of justice.
What a freak show that place is.
What I understood is that the only way lying can hurt you is if you are charged with something, then it can hurt your defense against the charges. However, if you are not charged with some "larger" more serious crime, then lying cannot hurt you because you cannot be charged with a seperate crime of lying or "obstructing justice". Why? Well, that's just the way their system works...