The user requirements contained in this URS are described in non-technical terms and are based on an analysis of the results for air interface enhancements from the TETRA Release 2 Market Questionnaire (see Bibliography)@ described in TR 102 021-1 [1]@ clauses 4.2 and 4.3. The present document provides the user requirements for TETRA intenvorking and roaming. The present document is applicable to the specification of TETRA Release 2 equipment.