If I may ask, allowed by whom? In a private parking lot, I imagine the company can give you such permission.
In a public parking place in most cities, you need a permit to park in spots reserved for the disabled. I think that's the issue - Jobs had no such permit - or perhaps no permit of any kind for his car
He didn't need a permit to park in a handicapped spot. Firstly, he parked in a handicapped place on the Apple campus (Which is private property - so no council permit was required). Secondly, Apple was his business - he was the co-founder, the CEO and the board chairman - he could basically do whatever he wanted. Finally, Apple was profitable because of him - they went into a downward spiral when he left, and their stock price has climbed ever since he returned - nobody in their right mind would risk losing (or severely annoying) him over a piece of tarmac with some paint on it.