39 McCANN AND OTHERS v. THE UNITED KINGDOM JUDGMENT 152. For the Commission, with whom the Government agreed, Article 2 (art. 2) was not to be interpreted as requiring an identical formulation in domestic law. Its requirements were satisfied if the substance of the Convention right was protected by domestic law. 153. The Court recalls that the Convention does not oblige Contracting Parties to incorporate its provisions into national law (see, inter alia, the James and Others v. the United Kingdom judgment of 21 February 1986, Series A no. 98, p. 47, para. 84, and The Holy Monasteries v. Greece judgment of 9 December 1994, Series A no. 301-A, p. 39, para. 90). Furthermore, it is not the role of the Convention institutions to examine in abstracto the compatibility of national legislative or constitutional provisions with the requirements of the Convention (see, for example, the Klass and Others v. Germany judgment of 6 September 1978, Series A no. 28, p. 18, para. 33). 154. Bearing the above in mind, it is noted that Article 2 of the Gibraltar Constitution (see paragraph 133 above) is similar to Article 2 (art. 2) of the Convention with the exception that the standard of justification for the use of force which results in the deprivation of life is that of "reasonably justifiable" as opposed to "absolutely necessary" in paragraph 2 of Article 2 (art. 2-2). While the Convention standard appears on its face to be stricter than the relevant national standard, it has been submitted by the Government that, having regard to the manner in which the standard is interpreted and applied by the national courts (see paragraphs 134-35 above), there is no significant difference in substance between the two concepts. 155. In the Court’s view, whatever the validity of this submission, the difference between the two standards is not sufficiently great that a violation of Article 2 para. 1 (art. 2-1) could be found on this ground alone. 156. As regards the applicants’ arguments concerning the training and instruction of the agents of the State and the need for operational control, the Court considers that these are matters which, in the context of the present case, raise issues under Article 2 para. 2 (art. 2-2) concerning the proportionality of the State’s response to the perceived threat of a terrorist attack. It suffices to note in this respect that the rules of engagement issued to the soldiers and the police in the present case provide a series of rules governing the use of force which carefully reflect the national standard as well as the substance of the Convention standard (see paragraphs 16, 18 and 136-37 above). (b) Adequacy of the inquest proceedings as an investigative mechanism 157. The applicants also submitted under this head, with reference to the relevant standards contained in the UN Force and Firearms Principles (see paragraphs 138-39 above), that the State must provide an effective ex post facto procedure for establishing the facts surrounding a killing by agents of