If any Biology or Molecular, Cellular and Developmental Biology (MCDB) course becomes full, students are strongly encouraged to use the waitlist. Overrides will be issued at the discretion of the instructor for a given course, prioritized by a combination of the student’s concentration, class schedule, and their order on the waitlist. Students on the waitlist must attend the first day of class or discussion and notify the instructor or GSI of their desire to enroll in the course. Students issued overrides will have a set amount of time to register (varies based on the period of registration). The Registrar’s Office will clear the waitlist of students’ names with expired overrides.