At which stage in Kohlberg's level of conventional morality does an individual realize the importance of maintaining law and order?

There are six stages of moral development by Lawrence Kohlberg. This constitute an adaptation of psychological theory by Jean Piaget. Kohlberg's moral development explained the ethical judgement of people.

The importance of maintaining law and order is on stage 4 which is also called the social system stage. On this stage, an individual must know how to obey the rules and law, and must know his or her duty.

In the fourth stage "social concern and conscience". It takes into consideration the will of society reflected in the law: the correct thing is obedience to the norm, not for fear of punishment but for the belief that the law maintains social order, so it should not be transgressed unless there is a reason that requires it. The type of reasoning of this stage develops during the second half of adolescence and has the characteristics of being a highly balanced stage.