This leaflet is applicable to:
new designs of single-tier and multi-tier vehicles for use in passenger night services offering sleeping car berths and/or couchettes, ordered after 1 January 2003;
existing night traffic vehicles undergoing extensive renewal and conversion work after 1 January 2003.
The provisions contained in this leaflet shall carry mandatory status, with the exception of those worded as recommendations (see points 2.10 - page 4, 4th paragraph; 3.2,1 - page 6, 9th paragraph;
3.2.2 - page 7, 3rd paragraph and 3.2.4 - page 8).