Students who apply for CNU should submit the required documents. Candidates are then selected by an admissions committee. Students who wish to transfer from other departments should also submit the required documents, with the Dean's signature. Students may only change departments once. The students who are accepted must choose one department as their major area among the departments in their division when they are a sophomore and/or junior. A student who already has a Bachelor's degree can be enrolled as a junior (except in the Medicinal school, Dentistry, and Veterinary Medicine). Students who withdrew or were expelled from school can be re-admitted once they are within the student quota.

When a student is absent from school for more than four weeks because of illness or other unavoidable circumstances, She must submit an application for temporary leave signed by his her guarantor to the Dean. The period of temporary leave should be less than two years (not to exceed two successive semesters). The period can be extended when caused by compulsory military service. Returning to school is permitted at the end of the temporary leave period.