For most diplomas and degrees, except those few specifically designated as distance or part-time courses, students must spend a period in residence – which means postgraduate students live in term time within 25 miles of Oxford. In exceptional circumstances, permission to reside outside the limits must be sought from the University through the Senior Tutor of the College. Students on part-time or distance-learning courses are exempt from the residence requirement. The minimum period of residence for most diplomas or the degrees of MSc or MSt is three terms. The minimum period of residence for the degrees of MPhil (BPhil in Philosophy), MLitt or DPhil is normally six terms.