Dear, If your car is still having applied for Registration plate then You can drive it as long as you do not get it registered. My car was 4500Km driven prior to registration. Last Tuesday I took the car to Islamabad and was aware that Golra Main Check post will cause some problem. So I put the Odometer to Trip, and from Mardan to Islamabad it almost covered 200, so when they look at the Odometer then they allowed me. But took 100Rs as a Mithayii coz my Windows were also tinted.
I wanted to register it asap so went to Islamabad Excise the same day and got it registered as UT-310... I also wanted UU serial but I had to wait for it....