The stability of the system was supposedly assured by the institution of the senior or high duke of Poland, based in Kraków and assigned to the special Seniorate Province that was not to be subdivided.
Stabilitatea sistemului se presupunea că trebuie asigurată de către Ducele sau Marele Duce al Poloniei, cu sediul în Cracovia, alocând provincia specială Senioratului care nu a fost divizat.