That's correct. A MPN is a requisite for getting the aid.
And of course accepting the aid from school, too?
another question for you regarding the Best Financial Aid to Accept. I've heard that some schools offer interest free tuition payment plans. Is this true?
Yes, it is. This type of loan can be very beneficial, because it allows the borrower to reduce the amount they will need to take out in loans. You should ask your financial aid office if this plan is available to you.