that it deems appropriate, any previous conviction in another State of an alleged offender for the purpose of using such information in criminal proceedings relating to an offence covered by this Convention. Article 23. Criminalization of obstruction of justice Each State Party shall adopt such legislative and other measures as may be necessary to establish as criminal offences, when committed intentionally: (a) The use of physical force, threats or intimidation or the promise, offering or giving of an undue advantage to induce false testimony or to interfere in the giving of testimony or the production of evidence in a proceeding in relation to the commission of offences covered by this Convention; (b) The use of physical force, threats or intimidation to interfere with the exercise of official duties by a justice or law enforcement official in relation to the commission of offences covered by this Convention. Nothing in this subparagraph shall prejudice the right of States Parties to have legislation that protects other categories of public officials. Article 24. Protection of witnesses 1. Each State Party shall take appropriate measures within its means to provide effective protection from potential retaliation or intimidation for witnesses in criminal proceedings who give testimony concerning offences covered by this Convention and, as appropriate, for their relatives and other persons close to them. 2. The measures envisaged in paragraph 1 of this article may include, inter alia, without prejudice to the rights of the defendant, including the right to due process: (a) Establishing procedures for the physical protection of such persons, such as, to the extent necessary and feasible, relocating them and permitting, where appropriate, non-disclosure or limitations on the disclosure of information concerning the identity and whereabouts of such persons; (b) Providing evidentiary rules to permit witness testimony to be given in a manner that ensures the safety of the witness, such as permitting testimony to be given through the use of communications technology such as video links or other adequate means. 3. States Parties shall consider entering into agreements or arrangements with other States for the relocation of persons referred to in paragraph 1 of this article. 27