You are looking at a schedule called 'Regulations continued in force as code of welfare'. This is part of the Animal Welfare Act 1999. It lists some rules that are still in force. These rules include the Animals Protection (Docking of Tails) Regulations 1972. There is also an amendment to this rule, called Amendment No 1, which was made in 1976. You can find out more about why these rules are in force by looking at section 199 of the Act.