This standard describes the specific "Design for PRM Use" requirements applying to rolling stock on the trans-European network (TEN) covered by the TSI for PRM and the assessment of those requirements. The following are valid for this standard: the definitions and requirements describe specific aspects of "Design for PRM Use" required by people with reduced mobility as defined in TSI PRM; people with reduced mobility as defined in TSI PRM; this standard defines elements which are universally valid for obstacle free travelling including toilets, elements for sitting/standing/moving and passageways/internal doors. The definitions and requirements of this standard are to be used for rolling stock applications; this part of the standard covers those requirements relating to "Toilets"; the standard only refers to aspects of accessibility for PRM passengers. It does not define general requirements and general definitions for specific components and systems; this standard assumes that the vehicle is in the defined operating condition, any damages or operating failures will not be taken into account when assessing these requirements; where minimum or maximum dimensions are quoted these are absolute NOT nominal requirements. The following areas of "Equipment and Components" from TSI PRM are covered in three parts: Part 1 contains: Toilets; Part 2 contains: Handholds; Seats; Wheelchair spaces; Part 3 contains: Passage ways; Internal Doors. This standard describes these areas with clear and consistent terms and definitions. Measurement methods and/or assessment procedures needed to establish a clear pass/fail assessment are provided where necessary