15.1. LPD shall not increase the overall width of the vehicle and the main part of its outer surface shall not be more than 150 mm inboard from the outermost plane (maximum width) of the vehicle. Their forward end may be turned inwards on some vehicles in accordance with paragraphs 15.2.3. and 15.2.4. Their rearward end shall not be more than 30 mm inboard from the outermost edge of the rear tyres (excluding any bulging of the tyres close to the ground) over at least the rearmost 250 mm. a0c0