it is illegal to hoist the national flag on your car like this. Only president, prime minister, chairman senate, speaker of national and provincial assemblies, chief justice of pakistan, governors and chief
ministers of the provinces, federal ministers and ministers of state, chief election commissioner and provincial ministers have the authority to hoist a flag on their. Sometimes COAS, Joint Chief and Core Commanders hoist the flags on their cars. Not even judges, DMG and IGs and other heads are allowed to hoist flags on their car. However there could be a legal technicality due to which you maybe able to hoist a flag on your car, you maybe able to hoist it in the middle or on the right side but I am not recommending this. Clarify it with a lawyer.