At many stores it is also possible to return items for a refund, though there is usually a time limit.

很多商店也可以让商品归还以退钱，不过这有时间限制。

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Time Limit: All teams must return to designates finishing point before a certain time regardless if they have finished the challenges or not.

时间限制：无论你是否已经完成或没有完成挑战的任务，时间一到所有的队员都必须返回到指定终点站集合。

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At many stores it is also possible to return items for a refund, though there is usually a time limit.

很多商店也允许退还商品并退钱，不过这有时间限制。

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The group's spokesman, Doug Church, said Federal Aviation Administration controllers in New York could try to accommodate long-delayed flights by allowing more departures at JFK, where the planes would not have to return to gates to comply with the time limit.

CNN: Air traffic jams in New York likely to jump

But there's no time limit if the IRS can prove a tax return was fraudulent.

FORBES: Who Does Your Taxes?

And if you never filed a return, or the government can prove you filed a fraudulent one, there's no time limit.

FORBES: Magazine Article