coubert已经指出了，如果单纯的作为taxi driver签租约就可以。

In a ratio set by law, 40% of New York's 13,257 medallions — a number strictly controlled by the city — are designated for individual, as opposed to corporate, ownership. Individual owners are required to drive at least part time, while corporate owners have the option of hiring an agent to lease the medallion full time for up to $800 a week.