This is my (basic, lay) understanding of how changes to UK law happen, as well. For example, here is a collection of "Statement of changes in Immigration Rules

This is my (basic, lay) understanding of how changes to UK law happen, as well. For example, here is a collection of "Statement of changes in Immigration Rules: 1994 to 2020": https://www.gov.uk/government/collections/immigration-rules-statement-of-changes https://www.gov.uk/government/collections/immigration-rules-... If you click on the latest document, "accessible" version, you'll find paragraphs such as the following: Changes to the Introduction Intro1. In paragraph 6.2, after the definition of “English language course”, insert: “ “EU national” in Appendix T5 (Temporary Worker) International Agreement Worker means a person who is a national of: Austria, Belgium, Bulgaria, Croatia, Republic of Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, or Sweden; and who is not also a British citizen.”. Changes to Part 7 7.1. For the second paragraph 276BB1(vi)(d), substitute: “(e) the Ministry of Defence, the Foreign and Commonwealth Office, the Department for International Development or the Foreign, Commonwealth and Development Office has determined should qualify for relocation under the ex-gratia redundancy / resignation package, including confirmation that they served ‘on frontline duties outside the wire in Helmand’.”. Anyone interpreting this law (i.e. lawyers) does not have the "latest" version to hand; they have to stack successive changes. There are other complications, which I can't recall, but I dearly wish someone would do this for UK law.