The 21-credit rule requires a minimum of 21 credits (excluding thesis seminars and compulsory internships) to be completed abroad. Courses taken at Corvinus based on a preferential study plan (up to 4 courses may be taken plus seminar and internship) are not involved in the 21 credits to be completed abroad but may be involved the 21 credits required for graduation. Foreign language courses may be involved in the 21 credits in the semester abroad.