The Movement of Animals (Restrictions) Order 1990
This Order enables a veterinary inspector, if he has reasonable grounds to suppose that any disease of animals (other than a disease which is subject to similar controls under another Order) exists on any premises, to prohibit, by a notice in Form A, the movement of animals, carcases or other things on to or off the premises, except under licence and to impose such other restrictions or requirements as he may consider necessary for the purpose of preventing the spread of disease. A notice in Form A will remain in force until it is withdrawn by a further notice in Form B served by a veterinary inspector. A notice in Form A shall be withdrawn by a notice in Form B if a veterinary inspector is satisfied that the suspected disease does not exist on the premises or the keeping in force of the notice in Form A is no longer necessary for the purposes of the Order (article 4 and Schedule).