On-campus employment must either be performed on the school's premises or at an off-campus location which is educationally affiliated with the school. In the case of off-campus locations, the educational affiliation must be associated with the school's established curriculum or related to contractually funded research projects at the post-graduate level. In any event, the employment must be an integral part of the student's educational program. Employment authorized under this paragraph must not exceed 20 hours a week while school is in session (exception due to hardship). An F-1 student may, however, work on campus full-time when school is not in session or during the annual vacation (8 CFR Sec 214(f)(9)). Approval from the student’s Designated School Official (DSO) must be obtained before employment can commence.