<ul><li><a href=https://lovdata.no/dokument/OV/forskrift/2015-12-17-1857 target=_blank>Regulation on noise for Oslo Airport(Forskfrift om støyforebygging for Oslo Airport Gardermoen, Akershus, FOR-2015-12-17-1857, entry into force 26.05.2016, §4)</a></li><li><a href=https://lovdata.no/dokument/SF/forskrift/2015-10-01-1168 target=_blank>Norwegian Regulation adopting EC Regulation No 598/2014 regarding regulation of noise-related operating restrictions(Forskfrift om støyrelaterte driftsbegrensninger for norske flyplasser, FOR-2015-10-01-1168, entry into force 13.06.2016 )</a></li></ul>