40 6. Any preservation effected in response to the request referred to in paragraph 1 of this Article shall be for a period not less than 180 days, in order to enable the requesting State Party to submit a request for the search, seizure or another preservation of information. Following the receipt of such a request, the requested State Party shall preserve that information pending a decision on that request. Article 51. Expedited disclosure of preserved technical parameters of the traffic 1. Where, in the course of the execution of a request for the preservation of information made pursuant to Article 50 of this Convention, the requested State Party discovers that a service provider in another State was involved in the transmission of information, the requested Sate Party shall expeditiously disclose to the requesting State Party a sufficient amount of traffic data to identify that service provider and the path through which the information whose preservation is sought was transmitted. 2. The request to preserve information may be refused if the requested Party considers that execution of the request may prejudice its sovereignty, security, or other essential interests. Article 52. Law enforcement cooperation 1. The States Parties shall cooperate closely with one another, consistent with their respective domestic legal and administrative systems, to enhance the effectiveness of law enforcement action to combat the offences covered by this Convention. The States Parties shall, in particular, adopt effective measures aimed at: (1) enhancing and, where necessary, establishing channels of communication between their competent authorities, agencies and services in order to facilitate the secure and prompt exchange of information concerning all aspects of the offences covered by this Convention, including, if the States Parties concerned deem it appropriate, links with other criminal activities;