This is margalla station police...rascals to be honest ...
they will just check your registration book, tint permit etc ..wont impound your car unless you dont have any valid identity and moreover you misbehave ...
they always have a problem with license plates ...you should have you license plates visible rest you can place anything you want
for tint ...you still can opt for the medical issue, for that there are i suppose right now only 2 doctors, whose tint prescription is legit
..........or get tint letter from DC Islamabad .............or get tint permit from Interior Ministry (it would be valid all over the country and is the most legit, and it wont ever be removed :P)
rest you can tint 25% ...iv had on all my cars, and to this day no one even stopped me except for traffic police once ..that too he asked me about the number plate, i have written 2 digits ..he asked me to add 0 before
..mean while he caught tints, he remembered i was on phone call and wasnt wearing seat belts ...