34 CFR §682.605

1. (a)Except in the case of a student who does not return for the next scheduled term following a summer break, which includes any summer term or terms in which classes are offered but students are not generally required to attend, a school must follow the procedures in § 668.22(b) or (c), as applicable, for determining the student's date of withdrawal. In the case of a student who does not return from a summer break, the school must follow the procedures in § 668.22(b) or (c), as applicable, except that the school shall determine the student's withdrawal date no later than 30 days after the first day of the next scheduled term.
2. (b)The school must use the withdrawal date determined under § 668.22(b) or (c), as applicable for the purpose of reporting to the lender and the Secretary the date that the student has withdrawn from the school.
3. (c)For the purpose of a school's reporting to a lender and the Secretary, a student's withdrawal date is the month, day and year of the withdrawal date.