There are seven different Laws of Succession to choose from in the game. These are:
- Salic Primogeniture
- Semi-salic Primogeniture
- Salic Consanguinity
- Semi-salic Consanguinity
- Salic Gavelkind
- Semi-salic Gavelkind
- Elective Law
The Law of Succession decides who the heir to any ruler in the game is. The line of succession can be seen from the ruler's character screen.
Note that when you change laws, you cannot change again in 20 years.