IIRC, that's because you are not extending the vehicle space 'consumption' in a manner that would constitute camping behaviour; a car driver could park, and sleep within the vehicle, as well as opening the sun roof and the vehicle windows. So, parking the M/Home and opening the roof vent is directly comparable.
My own interpretation of the need for clarification [so could very well be completely wrong ...] is that the Winter 2025 storms caused a major logjam in many areas, leading to complaints from the local populace; M/Homers headed for a parkup/Aire to avoid the storm, were forced to stay put in the subsequent windy/rainy post-storm aftermath, and then needed to wash/dry knickers & socks et seq; they needed then to dry the laundry, so the clothes airer appears in the open side window and/or on the rear bike rack, and the lack of driving on meant that solar power top up was needed, so out came the portable panels, often placed on the footpath under the open side window, and the footpath became impassable. Meanwhile, new arrivals during the lull had no real space to park because of the extra space the M/Home 'campers' were occupying [we were opposite 2 x French Vans at Moncofa street parking who each reversed at right angles to the parking, blocking one lane of the road, and used the 3 metre+ gap between the vehicles to set out a formal dining space for 4 people for a 2 hour lunch ...], so the parking became ever more hazardous and over the original number of spaces ... And then the M/Homers, including the Germans who had 2,4m Portable solar panels out on the footpath, started their engines to recharge the vehicle batteries, and that was the point at which another German M/Homer, fed up with the diesel exhaust fumes, phoned the Police on a Sunday morning ... Everybody, except us, because the inflated semi air suspension was not visible!, was told to stop the use of air suspension jacks and blocks, remove the portable solar panels and clothes airers and dogbaskets from the footpath, and close the side windows ...
Ironically, the Guardia Civil did not warn the German Caravanner who parked parallel in the parking layby, but with his portable step about 18 inches into the road, and all 4 stabilisers deployed ...
Steve
Steve