It is the student's responsibility to determine whether or not they are qualified to successfully complete summer online courses.
For courses without prerequisites, once you are admitted by the Registrar's Office, you can register via Banner.
For courses with prerequisites, after you are admitted, you will contact the course instructor to request permission to enroll. The instructor may require additional documentation (e.g., an official transcript). With the instructor's permission via the override process, you can register via Banner.