Can you stop the vehicle in such a designated space if you are transporting a disabled person with a parking permit?

In the photo you can see a car park; two parking spaces are painted blue with a white wheelchair symbol, and above them there is sign D-18 "parking" with plate T-29 with the same symbol. If you are carrying a person with a disability who holds a parking permit, you may park in a space marked this way. The answer is: yes.

The Regulation on road signs and signals states that plate T-29 under sign D-18 indicates a space intended for the motor vehicle of a person referred to in Article 8(1) and (2) of the Road Traffic Act, and a blue parking space with a wheelchair symbol is road marking P-24 with the same meaning. In Article 8 the Act lists a person with a disability who holds a parking permit and drives a vehicle marked with this permit and - in paragraph 2 - a driver of a vehicle carrying a person with a disability who holds a parking permit. So a driver carrying such a person uses the disabled parking space (koperta) on the same terms, provided that the permit is placed behind the windscreen so that its number and expiry date can be read. Without the permit, with only a passenger with limited mobility, parking here is not allowed; for taking such a space without the right to do so, the law provides for a high fine and towing of the vehicle.

Legal basis: Art. 8 para. 1, 2 and 3 of the Road Traffic Act (Prawo o ruchu drogowym); § 52 para. 6 and § 92 of the Regulation on road signs and signals