拿到缴费通知了，有些疑问。。

下面这段话是什么意思？
You will be required to pay a minimum 50% of your tuition fee in advance of Administrative enrolment the remainder to be paid by instalments as follows:
25% by 6th november,2006
25% by 15th january, 2007
是要我先交一半的学费，然后再分两次交清吗？