Which amendment, demarcating of the boundaries of the four provinces was done?

Which amendment, demarcating of the boundaries of the four provinces was done?

چاروں صوبوں کی حدود کی کون سی ترمیم، حد بندی کی گئی؟
Explanation

The First Amendment redefined the international and provisional boundaries, federal treaties of Pakistan, and naval treaties of Pakistan.


About First Amendment

The First Amendment to the Constitution of Pakistan was enacted on 4 May 1974. 

Articles 1, 8, 17, 61, 101, 193, 199, 200, 209, 212, 250, 260 and 272, and the First Schedule of the Constitution of Pakistan were amended.