<ul><li><a href=http://www.legislation.gov.uk/uksi/1997/2389/made target=_blank>The Airports (Groundhandling) Regulations 1997(last updated in October 1997, Section 10    )</a></li><li><a href=https://www.legislation.gov.uk/uksi/2018/1088/contents/made target=_blank>The Airports (Groundhandling) (Amendment) (EU Exit) Regulations 2018( The Airports (Groundhandling) (Amendment) (EU Exit) Regulations 2018, UK SI 2018 No. 1088)</a></li></ul>