The UK does this (but only since 2006, ish, and it's not guaranteed to be fully up to date everywhere). For example, here's an act made in 1981 and amended many

The UK does this (but only since 2006, ish, and it's not guaranteed to be fully up to date everywhere). For example, here's an act made in 1981 and amended many times since: https://www.legislation.gov.uk/ukpga/1981/69 https://www.legislation.gov.uk/ukpga/1981/69 Inserted or altered text is in heavy square brackets, and removed text is replaced with a row of full stops; both are labelled with a code starting with F, which indexes a reference in a box below the section. The references are hyperlinks to the amending legislation; sometimes there is a link to both an act which enabled the amendment, and a statutory instrument which applied it. There's a slider at the top which lets you see the legislation as it stood in the past (as far as 1991), before each amendment was made. Amendments made before 1991 are applied, but not sliderable: https://www.legislation.gov.uk/aep/Hen3c23/52/23/section/XXIII https://www.legislation.gov.uk/aep/Hen3c23/52/23/section/XXI...