the analysis of rules and forming of unilateral administrative actions

administrative organizations for doing public services and keeping public order are obliged to make decision and do unilateral and bilateral actions. what are rules and conditions of forming unilateral administrative actions? regarding observing principle of rule of law on administration, administrative organizations should observe principles and rules for doing their duties and decision-making. some rules in constitution and some other will be anticipated in rules, regulations and judicial procedures. we’re trying to study rules and conditions of forming unilateral administrative actions in different countries including our country.