- The Supreme Court in the Berubari Union case (1960) initially held that the Preamble is not a part of the Constitution. - In the Kesavananda Bharati case (1973), the court reversed its decision and held that the Preamble is a part of the Constitution and can be amended, provided the basic structure is not altered. - The Bommai case (1994) reaffirmed that the Preamble is a part of the Constitution and emphasized its role in understanding the basic structure.