There has always been some discomfort about reservations in relation to international obligations of States applicable to individuals. This apprehension was once again brought to the forefront of the international normative process with General Comment No. 24 of the Human Rights Committee and the work of the International Law Commission on reservations to treaties.This book is a contribution to the debate on reservations to human rights treaties. Several key questions are addressed. Can the reservations' regime, as codified in the 1969 Vienna Convention on the Law of Treaties, adequately address human rights relationships? Is there a danger of further fragmentation of international law if human rights treaties were to be treated differently as concerns the reservations'regime applicable to these treaties? Should the distinction be made between the validity of a reservation and the effects of a reservation found to be invalid? These and other questions continue to generate a variety of answers.