TL9000新增要求的理解

l) resubmit corrected data not later than the 2nd data submission after
identifying the problem when it is determined that a data resubmission is
required
这一点怎么理解修正数据重新提交应不晚于发现问题并确认需要重新提交的第二个周期，这个第二个周期是说7个星期？还是说紧接着新数据上传的时间？

2) The organization shall document the method of determining which of the
returns are within the eighteen-month basis shipping period. This
determination shall be based on shipment of the FRU to the customer.
请问怎么做就是文件界定？

3）units that have been permanently removed from service by the customer

是指客户不需要维保？能否举个例子，便于理解

请大师们指点，先谢过了:D