25 C.F.R. § 39.210
When must a school drop a student from its membership?
If a student is absent for 10 consecutive school days, the school must drop that student from the membership for ISEP purposes of that school on the 11th day.
If a student is absent for 10 consecutive school days, the school must drop that student from the membership for ISEP purposes of that school on the 11th day.