In the absence of children, inheritance passes to collateral relatives in order of seniority of their lines of descent. With Primogeniture succession, all titles of the ruler are inherited by the oldest child. In order to change the succession law to Seniority a ruler needs to meet the following conditions. With Seniority succession, all titles of the ruler are inherited by the oldest member of the dynasty. In order to change the succession law to Gavelkind a ruler needs to meet the following conditions. If the ruler has no children that can inherit, the law reverts to Primogeniture. If a ruler of, for example, king rank has multiple kingdom titles, the succession laws of each kingdom will apply for that kingdom, and the de jure territory of that kingdom. If a ruler holds multiple titles, the succession laws of the highest ranked realm apply. Every title in Crusader Kings II has associated succession laws. Succession laws are those laws that govern who becomes the new ruler of a realm upon the death of the previous incumbent.
