<ul><li><a href=http://www.legislation.gov.uk/uksi/1997/2389/made target=_blank>The Airports (Groundhandling) Regulations 1997(last updated in March 2013, Section 12)</a></li><li><a href=http://www.legislation.gov.uk/ukpga/1998/41/contents target=_blank>Competition Act 1998(last updated in June 2017)</a></li></ul>