Hi Aspirant,

It was an issue regarding the fact that whether preamble can be amended or not.Berubari case was the Presidential Reference Under Art. 143(1) of the Constitution of India on the implementation of the Indo-Pak agreement relating to Berubari union and exchange of enclaves which come up for consideration by a bench consisting of eight judges headed by B.P.Sinha, C.J. Justice. Gajendragadkar delivered the unanimous opinion of the court.

Hope it helps!!