Please can you assist with the Rules when carrying passengers in a closed truck and a bakkie?
National Road Traffic Act Regulations 247 and 251 are relevant.
Circumstances under which persons may be carried on goods vehicle
Reg 247. No person shall operate on a public road a goods vehicle conveying persons unless that portion of the vehicle in which such persons are being conveyed is enclosed to a height of—
(a) at least 350 millimetres above the surface upon which such person is seated;
(b) at least 900 millimetres above the surface on which such person is standing, in a manner and with a material of sufficient strength to prevent such person from falling from such vehicle when it is in motion.
Provided that no person shall be conveyed in the goods compartment together with any tools or goods, except their personal effects, unless that portion in which such persons are being conveyed is separated by means of a partition, from the portion in which such goods are being conveyed.
Persons not to be carried in goods compartment for reward
Reg 250. No person shall on a public road carry any person for reward in the goods compartment of a motor vehicle.