Safety Order No. 03/2021 relating to limitations of the use of airspace in wider area of the Belgrade, as from 10th October 2021 till 15thOctober 2021 can be found on this link  Requirements for entry into the Republic of Serbia, including information for passengers arriving from State with special risk from spreading COVID-19 contagious disease,  and travelling abroad can be found on Ministry of Foreign Affairs’ web page https://www.mfa.gov.rs/en Information for passengers regarding conditions for entering Republic of Serbia are available in the form of NOTAM and can be found on Serbia and Montenegro Air Traffic Agency website - link  On March 12, 2020, the Civil Aviation Directorate of the Republic of Serbia issued an Operational Notice regarding the implementation of safety measures requiring public air transport operators to provide sufficient disinfectants to prevent the spreading of COVID-19   

Communication Navigation Surveillance Department – CNS Department

CNS Department is responsible for monitoring and implementation of the international regulations (rules), standards and  recommended practices in the area of communication, navigation and surveillance systems and devices (CNS), analyzes the need and makes proposals of rules and individual bylaw acts in accordance with the law, other national regulations and ratified international conventions in the area of CNS; performs functions of the National Supervisory Authority of the Republic of Serbia in the area of communication navigation and surveillance systems and equipment (CNS) of air navigation services providers; conducts initial, periodical and additional audits and inspections of air navigation services providers in the area of CNS; does oversight and approves the changes into a functional system in the area of CNS; performs analytical tasks of safety related events; performs regulatory and supervisory tasks related to the training and licensing of air traffic safety electronic personnel; performs analytical tasks related to the obstacles that affect the operation of CNS systems and devices; does coordination of resources such as aeronautical frequencies and radar codes.