text: is present shall, with respect thereto, rely on a certificate of the competent authority of the other State as evidence of the existence or non-existence of that right or obligation. "ARTICLE 13 "Availability of persons in custody to give evidence or to assist in investigations 129/ "1. Upon request of the Requesting State, and if the Requested State agrees and its law so permits, a person in custody in the latter State may, subject to his or her consent, be temporarily transferred to the Requesting State to give evidence or to assist in the investigations. "2. While the person transferred is required to be held in custody under the law of the Requested State, the Requesting State shall hold that person in custody and shall return that person in custody to the Requested State at the conclusion of the matter in relation to which transfer was sought or at such earlier time as the person's presence is no longer required. "3. Where the Requested State advises the Requesting State that the transferred person is no longer required to be held in custody, that person shall be set at liberty and be treated as a person referred to in article 14. "ARTICLE 14 "Availability of other persons to give evidence or assist in investigations 130/ "1. The Requesting State may request the assistance of the Requested State in inviting a person: 129/ In bilateral negotiations, provisions may also be introduced dealing with such matters as the modalities and time of restitution of evidence and the setting of a time limit for the presence of the person in custody in the Requesting State. 130/ Provisions relating to the payment of the expenses of the person providing assistance are contained in paragraph 3 of article 14. Additional 
analysis: The text appears to be discussing international cooperation and legal frameworks for sharing evidence and facilitating investigations between countries. It does not seem to be related to economic development, natural resources, agriculture, forestry, fishing, industry, transport, communication, international trade, health, education, employment, humanitarian aid, or culture. The text does seem to have a focus on international cooperation and the sharing of resources, which is more closely related to science and technology.