UNAM’s General Regulation of Examinations gives students a second route to pass a subject. Article 14 opens exámenes extraordinarios, extraordinary exams, to students who “no hayan acreditado las materias correspondientes” (have not passed the corresponding subjects). Article 16 says: “Los estudiantes tendrán derecho a presentar hasta dos materias por semestre mediante exámenes extraordinarios” (Students shall have the right to take up to two subjects per semester through extraordinary exams).