OBS_VALUE: <ul><li><a href=http://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1457097284853&uri=CELEX:32008R1008 target=_blank>Regulation 1008/2008 on the operation of air services(Regulation (EC) No 1008/2008 on common rules for the operation of air services in the Community, OJ L 293, p. 3, adopted on 24 September 2008, Article 4)</a></li><li><a href=https://www.boe.es/buscar/act.php?id=BOE-A-1960-10905 target=_blank>Air Traffic Act(Ley 48/1960, de 21 de julio, de Navegación Aérea, adopted on 21 July 1960, last amended on 17 October 2014)</a></li></ul>