<![CDATA[The 1945 Constitution of the Republic of Indonesia (UUD NRI 1945) is the highest basic law that serves as the foundation for the administration of national and state life in Indonesia. This article comprehensively discusses the meaning of a constitution, the characteristics and position of the 1945 Constitution, the relationship between the Preamble and the body of the Constitution, the dynamics of its implementation from the independence era to the Reform era, as well as the amendment process carried out four times between 1999 and 2002. This study employs a normative legal research method using statutory and historical approaches. Data were collected through library research using various relevant primary and secondary sources. The results of the study indicate that the 1945 Constitution holds a very fundamental position as the grundnorm or basic norm of the Indonesian legal system, so any amendments to it must still consider the values that live within society. In addition, the Preamble of the 1945 Constitution contains fundamental principles that serve as the philosophical foundation for all articles in the body of the Constitution. The amendments to the Constitution have also brought significant changes to Indonesia’s constitutional system, particularly in strengthening democracy, protecting human rights, and establishing a clearer separation of powers.]]>
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