Boarding Period

Boarding Period: Last departure date must fall on 30 September 2009 and complete travel accordingly to ticket’s terms and conditions.
这句话什么意思？

Boarding Period Posteffective Period？？ the boarding house是什么意思啊？ water boarding的意思是什么呀？ is boarding school benefical to the students? late registration period是什么意思？ notice period是什么意思呀 period 是啥意思？ In this period是什么意思 period style是什么意思？