<ul><li><a href=http://www.pgdlisboa.pt/leis/lei_mostra_articulado.php?nid=1210&tabela=leis&ficha=1&pagina=1& target=_blank>Decree-Law General Regulation of Noise(Decreto Lei do Regulamento Geral do Ruído, Adopted 17/01/2007, Last modification 01/08/2007, Article 20)</a></li><li><a href=https://dre.pt/pesquisa/-/search/445347/details/maximized target=_blank>Decree-Law 293/2003 that transposes at national level the EC Directive 2002/30/EC(Decreto Lei que transpõe para a ordem jurídica nacional a Directiva n.º 2002/30/CE, Adopted 19/11/2003,  Articles 4 and 6    )</a></li><li><a href=https://dre.pt/web/guest/pesquisa/-/search/572674/details/maximized target=_blank>Ordinance 259/2005 on the schedules for Lisbon airport( Portaria sobre os horários do aeroporto de Lisboa, Adopted 16/03/2005)</a></li></ul>