19 2. Where a State Party due to the long-established principles of its domestic legal system cannot adopt the measures provided for in paragraph 1 (a) of this Article, it may instead adopt legislative and other measures as may be necessary to ensure the real-time collection or recording of the technical parameters of the traffic in its territory through the application of technical means in that territory. 3. Each State Party shall adopt such legislative and other measures as may be necessary to oblige a service provider to keep confidential the fact of the execution of any power provided for in this Article and any information relating to it. 4. The powers and procedures referred to in this Article shall be subject to the provisions of Articles 21 and 22 of this Convention. Article 28. Collection of information transmitted through ICT 1. Each State Party shall adopt such legislative and other measures as may be necessary, in relation to offences provided for by this Convention and established under its domestic legislation, to empower its competent authorities to: (a) collect or record, through the application of technical means, in the territory of that State Party, information transmitted through ICT; and (b) oblige service provider, within its existing technical capability: - to collect or record through the application of technical means in the territory of that State Party computer information transmitted with the use of ICT; or - to cooperate with and assist the competent authorities of that State Party in collecting or recording in real time computer information transmitted through ICT in the territory of that State Party. 2. Where a State Party, due to the long-established principles of its domestic legal system, cannot adopt the measures referred to in paragraph 1 (a) of this Article, it may instead adopt legislative and other measures as may be necessary to ensure the real-time collection or recording of computer information