| 1st-7th |
1974-77 |
Bhutto |
Minor/procedural; FSF, defection clause, etc. |
| 8th |
1985 |
Zia |
Article 58(2)(b) — President's power to dissolve NA unilaterally; Art. 2A (Objectives Resolution substantive); indemnified martial law acts |
| 13th |
1997 |
Nawaz II |
Repealed 58(2)(b) — restored PM supremacy |
| 14th |
1997 |
Nawaz II |
Anti-defection clause strengthened |
| 17th |
2003 |
Musharraf |
Restored 58(2)(b)-like presidential powers; indemnified Musharraf's actions; Legal Framework Order incorporated |
| 18th |
2010 |
PPP coalition |
Landmark — removed 58(2)(b) permanently; abolished Concurrent List (major provincial autonomy); renamed NWFP→KP; Judicial Commission for judges' appointments; PM's powers over caretaker govt, service chiefs appointments |
| 19th |
2010 |
PPP coalition |
Adjusted judges' appointment process (Parliamentary Committee review role) after SC objections to 18th Amendment's JC composition |
| 20th |
2012 |
PPP coalition |
Neutral caretaker government/ECP appointment mechanism for free elections |
| 21st |
2015 |
PML-N |
Allowed military courts to try civilians for terrorism (2-year sunset clause, post-APS Peshawar attack) |
| 25th |
2018 |
PML-N |
Merged FATA into Khyber Pakhtunkhwa, abolishing separate tribal-area (FCR) status |
| 26th |
2024 |
PML-N/PPP coalition |
Constitutional Benches in SC/HCs; changed CJP appointment (parliamentary committee picks from 3 senior-most judges, diluting strict seniority principle); fixed 3-year CJP term |