The decree for the formation of the National Consultative Assembly; the birth of the institution of law in Iran.

One of the most important events associated with the 16th of Mordad is the issuance of the decree for the formation of the National Consultative Assembly in 1906. This decree was issued following the constitutional movement and after months of protests, sit-ins, and social pressure, and it provided the groundwork for the establishment of an institution that was supposed to limit the power of the monarchy in favor of law and the people's representatives.

The Constitutional Revolution was not merely a change in the form of government; it was an effort to transition Iran from an order based on the personal will of the Shah and the court to an order in which law, parliament, and government responsibility had a clearer place. Of course, the issuance of the decree alone did not mean the full establishment of constitutional rule.

The construction of new institutions, the drafting of the constitution, the formation of the parliament, and the resistance of traditional and court forces led to years of political and social conflict. Nevertheless, the 16th of Mordad in 1906 can be considered one of the days when the idea of the "rule of law" moved from the level of a social demand to the stage of institutional establishment. The parliament, with all its weaknesses and limitations, was supposed to be the voice of groups that until then had little share in political decision-making.