scope:

The present document describes the handling of national parameters and implementations in the context of the Inter LEA Handover Interface and cross-border data exchange in criminal matters, e.g. through Mutual Legal Assistance Treaty (MLAT) or using the secure European Judicial Network. In combination with the Inter LEA Handover Interface (ILHI) specification this is a practical guideline for Law Enforcement Agencies and vendors of LEMF.

One aspect is the mapping of national data structures and single parameters into a related ETSI standard and, if necessary, also the mapping back into the national structure.

In addition, the present document gives an overview about the necessary parameters for the handover itself in the form of a library (checklists) for Lawful Interception (LI) and Lawful Disclosure (LD). For the library no special values for the parameters are specified, but the (bilateral) tuning of these parameters is facilitated. For the deployment cases where no ETSI conformant implementation is available, the present document provides examples of mapping between national formats and the ETSI format for LI.

The juridical aspects for using the provided mapping are out of scope of the present document.

The considerations provided in the present document do not modify, override, or otherwise introduce incompatible changes to ETSI or national standards, nor do they prescribe requirements on communication service providers.