According to the Pakistan Laws for Motor Transport  (Baluchistan, N.W.F.P, Punjab, Sind Motor Vehicles Ordinance 1965.)


Section 4. Age limit in connection with driving of Motor Vehicles. (1) No person shall drive in any public place — 


(iii) a motor car as a paid employee or a transport vehicle, unless he has attained the age of twenty-one years;


(b) The licensing authority shall not make on any licence any such endorsement as is referred to in clause (a) unless it appears from the medical certificate furnished by the holder of the licence that he is not suffering from any disease or disability specified in the Second Schedule or any other disease or disability which is likely to cause the driving by him of a transport vehicle to be a source of danger to the public or to the passengers.


Section 4 (2) (b) The licensing authority shall not make on any licence any such endorsement as is referred to inclause (a) unless it appears from the medical certificate furnished by the holder of the licence that he is not suffering from any disease or disability specified in the Second Schedule or any otherdisease or disability which is likely to cause the driving by him of a transport vehicle to be a sourceof danger to the public or to the passengers.