This land partition had already been legitimized in 1598 by the House Treaty of Gera, which was prepared for this purpose. Christian's assumption of the government of Kulmbach took place at the same time as that of Joachim Ernst in Ansbach.
The land division had been officially recognized in 1598 through the Treaty of Gera, which was designed to facilitate this process.  Christian's appointment as ruler of Kulmbach coincided with Joachim Ernst's appointment as ruler of Ansbach.