OBS_VALUE: <ul><li><a href=http://www.legislation.gov.uk/uksi/2011/3066/made target=_blank>The Railways (Interoperability) Regulations 2011(No. 3066, last updated in December 2011)</a></li><li><a href=https://www.legislation.gov.uk/uksi/2019/345/made target=_blank>The Railways (Interoperability) (Amendment) (EU Exit) Regulations 2019(The Railways (Interoperability) (Amendment) (EU Exit) Regulations 2019, UK SI 2019 No. 345)</a></li></ul>