Which of the following conditions besides a safety seat or other restraint system must be met for a child less than 150 cm tall to be transported in a passenger car?

The question is about the condition under which a child less than 150 cm tall may travel in a passenger car without a child seat or other restraint device. This condition is a medical certificate stating that the child should not be carried in a child seat - answer B.

The Road Traffic Act requires a child less than 150 cm tall to be carried in a passenger car in a child safety seat or other restraint device suited to the child's weight and height, and at the same time states that this rule does not apply, among others, to carrying a child who has a medical certificate stating that the child should not be carried in a child seat or other restraint device. The certificate contains the child's details and its period of validity; it is worth carrying it with you. Answer A is wrong - no speed, not even 40 km/h, releases you from using a child seat. Answer C is wrong: there is no vehicle marking which replaces a child seat. Other exceptions are travel by taxi, by ambulance and in a vehicle of the Police, the Border Guard or the municipal police (straż gminna); separately, the Act allows the use of seat belts alone for a child at least 135 cm tall on the rear seat when no suitable child seat can be chosen, and for a third child aged at least 3 when two child seats leave no room.

Legal basis: Art. 39 para. 3, 3b, 3c, para. 4 point 4 and para. 5 of the Road Traffic Act (Prawo o ruchu drogowym)