Decree on job classification and criteria for job description of civil servants (“Official Gazette of RS”, no. 117/2005, 108/2008, 109/2009, 95/2010, 117/2012, 84/2014, 132/2014 , 28/2015, 102/2015, 113/2015, 16/2018, 2/2019, 4/2019, 26/2019, 42/2019 and 56/2021)