CCPR/C/21/Rev.1/Add.6 page 6 or acts occurring before the date of entry into force of the first Optional Protocol have continued to have an effect on the rights of a victim subsequent to that date. Reservations have been entered which effectively add an additional ground of inadmissibility under article 5, paragraph 2, by precluding examination of a communication when the same matter has already been examined by another comparable procedure. In so far as the most basic obligation has been to secure independent third party review of the human rights of individuals, the Committee has, where the legal right and the subject-matter are identical under the Covenant and under another international instrument, viewed such a reservation as not violating the object and purpose of the first Optional Protocol. 15. The primary purpose of the Second Optional Protocol is to extend the scope of the substantive obligations undertaken under the Covenant, as they relate to the right to life, by prohibiting execution and abolishing the death penalty. 5/ It has its own provision concerning reservations, which is determinative of what is permitted. Article 2, paragraph 1, provides that only one category of reservation is permitted, namely one that reserves the right to apply the death penalty in time of war pursuant to a conviction for a most serious crime of a military nature committed during wartime. Two procedural obligations are incumbent upon States parties wishing to avail themselves of such a reservation. Article 2, paragraph 1, obliges such a State to inform the Secretary-General, at the time of ratification or accession, of the relevant provisions of its national legislation during warfare. This is clearly directed towards the objectives of specificity and transparency and in the view of the Committee a purported reservation unaccompanied by such information is without legal effect. Article 2, paragraph 3, requires a State making such a reservation to notify the Secretary-General of the beginning or ending of a state of war applicable to its territory. In the view of the Committee, no State may seek to avail itself of its reservation (that is, have execution in time of war regarded as lawful) unless it has complied with the procedural requirement of article 2, paragraph 3. 16. The Committee finds it important to address which body has the legal authority to make determinations as to whether specific reservations are compatible with the object and purpose of the Covenant. As for international treaties in general, the International Court of Justice has indicated in the Reservations to the Genocide Convention Case (1951) that a State which objected to a reservation on the grounds of incompatibility with the object and purpose of a treaty could, through objecting, regard the treaty as not in effect as between itself and the reserving State. Article 20, paragraph 4, of the Vienna Convention on the Law of Treaties 1969 contains provisions most relevant to the present case on acceptance of and objection to reservations. This provides for the possibility of a State to object to a reservation made by another State. Article 21 deals with the legal effects of objections by 5/ The competence of the Committee in respect of this extended obligation is provided for under article 5 - which itself is subject to a form of reservation in that the automatic granting of this competence may be reserved through the mechanism of a statement made to the contrary at the moment of ratification or accession.