Through which constitutional amendment, Federally Administered Tribal Areas (FATA) were merged with Khyber Pakhtunkhwa?

Through which constitutional amendment, Federally Administered Tribal Areas (FATA) were merged with Khyber Pakhtunkhwa?

Explanation

An Act further to amend the Constitution of the Islamic Republic of Pakistan. Passed, In National Assembly: May 24th, 2018