Règle correspondante
Practice Relating to Rule 36. Demilitarized Zones
Section A. Establishment of demilitarized zones
Croatia’s LOAC Compendium (1991) states that the following are not allowed in a demilitarized zone: a) the presence of combatants; b) the presence of mobile weapons; c) the presence of mobile military equipment; d) any act of hostility; and e) any activity related to the conduct of military operations. 
Croatia, Compendium “Law of Armed Conflicts”, Republic of Croatia, Ministry of Defence, 1991, p. 11.