Rules: Principles has three levels. The first level restricts the hero only slightly, the second level is demanding, and the third places heavy restrictions on the hero’s actions. The hero can follow more than one set of principles, but can receive adventure points for this disadvantage only once (for the highest level of Principles). Characters acting against their principles suffer a penalty of 1 in all skill checks for at least an hour (the GM determines duration based on the situation).
AP Value: -10 adventure points per level
Publication: Core Rules page 176