Reasonable differences are permitted if due to seniority or merit. Typically, longer contracts denote greater seniority or higher rank. Associate NCC officers are given following ranks according to their seniority and their training. Responsibilities as vary with the seniority of the civil servant. Bureaucratic positions also exist as part of stable career tracks that reward office-holders for seniority. There are also allowances for taking vacations and sabbaticals without losing one's seniority. Chief forms are "agnatic seniority" and "agnatic primogeniture". Salaries vary depending on the type of development work, location, and level of seniority. The other justices are seated in order of seniority. There were also grievances over the issue of promotions, based on seniority. The relative seniority varies between institutions. The County of Anjou followed inheritance by agnatic seniority. The dynasty followed agnatic seniority and the "izgoi" principle. An elder is someone with a degree of seniority or authority. Anyone who did so was subject to a military tribunal of the corresponding seniority level.