77 generation, transmitted, received or stored in any computer resource. 15. Acknowledgement of instruction.— The designated officer of the intermediary or person in-charge of computer resources shall acknowledge the instructions received by him through letters or fax or e-mail signed with electronic signature to the nodal officer of the concerned agency within two hours on receipt of such intimation or direction for interception or monitoring or decryption of information. 16. Maintenance of records by designated officer.— The designated officer of intermediary or person in-charge of computer resource authorised to intercept or monitor or decrypt any information shall maintain proper records mentioning therein, the intercepted or monitored or decrypted information, the particulars of persons, computer resource, e-mail account, website address, etc. whose information has been intercepted or monitored or decrypted, the name and other particulars of the officer or the authority to whom the intercepted or monitored or decrypted information has been disclosed, the number of copies, including corresponding electronic records of the intercepted or monitored or decrypted information made and the mode of the method by which such copies, including corresponding electronic records are made, the date of destruction of the copies, including corresponding electronic record and the duration within which the directions remain in force. 17. Decryption key holder to disclose decryption key or provide decryption assistance.— If a decryption direction or a copy thereof is handed to the decryption key holder to whom the decryption direction is addressed by the nodal officer referred to