This deferment postpones repayment while you are attending a Title IV school* on at least a half-time basis. Full-time, half-time, or less than half-time enrollment is determined by your institution and must be clearly expressed on any enrollment verification provided by the school in order for this deferment to apply.
* A Title IV school is one that grants federal funding (i.e. Pell grants, Subsidized and Unsubsidized Loans, etc).