These are the laws of the Poku Saeruo Degonjo regarding Ruokai (Houses). These laws cover both Ruoka and Ruoka'ka.
When necessary a Ruoka may split either due to size or internal problems.
Sometimes for the mutual benefit of the members, two Ruoka may choose to merge
It is rare that a Ruoka is dissolved, it happened in 537 CY The Weakening due to the high deaths. The only other time Ruoka is dissolved is as punishment. This very nearly happened to prominent Ruoka during 325 CY Year of Bad Blood.
There are two ways to enter an existing Ruoka. Marriage and invitation.