Not a law, but as pointed out some parking lots require a direction, usually only so that the parking sticker patrol can easily see your parking sticker or tag without having to walk all over the place.
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2004 S60R - 350+ HP, AWD, Custom FMIC & Exhaust, Active Suspension & A Big Set Of Brembos
Crazy Camber, Stretch & Poke; its the new triple-stack-bleacher-wing ricer fad that's all the rage nowadays, lol