Knowledge of and regarding the law.
Ability Score(s): Reason + Common Sense
Usage: Knowledge regarding the law and its application. This is especially helpful in determining the local law of the land, finding legal loopholes, and determining if actions you take could lead to legal repercussions.
In order to determine the law of the land at least 1 hour and a DC 30 Law check is required.
Finding legal loopholes is especially beneficial in court cases being undertaken or in getting out of being arrested by guards for minor laws they didn't even know about. This is up to GM's discretion on if a loophole even exists for whatever it is the player is attempting to argue with however discovery of loopholes requires between 2 - 48 hours and familiarity with the local law of the land, and finally a DC 50 Law check. After discovery the loophole can be invoked, and usually (unless the court is unjust) this loophole benefits you.
Determining whether something could yield positive or negative legal ramifications largely is determined by how specific the situation is. Common crimes or situations are determined by a DC 15 Law check however more specific scenarios may have higher checks (between DC 25 and DC 50 depending on how specific the case is).