([Commission recommendation on the basic parameters of the trans-European high-speed rail system, chap. 6.1 (2001/290/CE) (OJ L 2001/100/21), 2013-06-26, Internet](http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2001:100:0017:0026:EN:PDF))