The school, department or course office, whichever is appropriate, publishes its requirements for attendance on school notice boards and/or in handbooks and elsewhere, as appropriate. Students are asked to fulfil the course requirements of the school or department, as appropriate, regarding attendance.
At the end of the teaching term, if you students have not satisfied the school or department requirements regarding attendance they may be reported as non-satisfactory for that term. If Students who are reported as non-satisfactory for the Michaelmas, Hilary or Trinity terms of a given year you may be refused permission to take annual examinations and may be required by the Senior Lecturer to repeat the year.
Full details can be found in the procedures for completing a report on non-satisfactory student attendance guide.