it was done around the time when the country collapsed to reduce the amount of taxis to make the game more viable and make it more difficult theoretically for part timers to stay in the game and new entrants to enter. ye had that cunty 3 year rule as well if you wanted to buy a plate you could'nt put it on a car less than 3 years old. made the cost of entry in to the game about 25K+ during a filthy dirty recession.