if you are a tax payer of a 7 digit figure for past 5 years continously, you can apply for an import permit of a new or a 3 year old used vehicle. Upon landing you can pay applicable duty & taxes., and register under your name or corporate entity over which the import permist is issued.
The vehicle can be sold only after 3 years of registration, or later.
Thats' how some of High End Crown Jewel vehicles are legally registered and used in Pakistan.