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If a driver is subject to work time requirements, what is the maximum period of work time permitted in any cumulative work period?
受工作时间规定约束的驾驶员，在一个累计工作周期内，最多允许工作多久？
Under the standard rules, the maximum work time in a cumulative work period is 70 hours.
一般规定下，一个累计工作周期内最多工作70小时。
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At least 24 continuous hours of rest are required before starting a new period. Daily work and rest limits must also be met.
达到上限后须连续休息至少24小时，才能开始新周期；每天的工时和休息限制仍须同时满足。