Security Offences (Special Measures) 13 (a) require a communications service provider to intercept and retain a specified communication or communications of a specified description received or transmitted, or about to be received or transmitted by that communications service provider; or (b) authorize a police officer to enter any premises and to install on such premises, any device for the interception and retention of a specified communication or communications of a specified description and to remove and retain such evidence. (3) Notwithstanding subsection (1), a police officer not below the rank of Superintendent of Police may— (a) intercept, detain and open any postal article in the course of transmission by post; (b) intercept any message transmitted or received by any communication; or (c) intercept or listen to any conversation by any communication, without authorization of the Public Prosecutor in urgent and sudden cases where immediate action is required leaving no moment of deliberation. (4) If a police officer has acted under subsection (3), he shall immediately inform the Public Prosecutor of his action and he shall then be deemed to have acted under the authorization of the Public Prosecutor. (5) The court shall take cognizance of any authorization by the Public Prosecutor under this section.