These amendments to the principal regulations give effect to the provisions of Council Directive 99/74/EC, laying down minimum standards for the protection of laying hens, in establishments with 350 or more laying hens. The Regulations insert new definitions and insert a new regulation 5 and Schedule 3, to apply requirements in relation to the keeping of laying hens other than in the systems referred to in the new Schedules 3A, 3B, 3C and 3D to the principal Regulations. They also insert a new Regulation 5A and Schedules 3A, 3B, 3C and 3D to the principal Regulations, to apply requirements in relation to the keeping of laying hens in the systems referred to in the new Schedules 3A, 3B, 3C and 3D to the principal Regulations. The new Schedule 3A to the principal Regulations specifies requirements for the conditions, including the stocking density, in which laying hens may be kept in non-cage systems. The new Schedule 3B to the principal Regulations specifies requirements for the conditions for laying hens kept in conventional (battery) cages. The new Schedule 3C to the principal Regulations provides that all cage systems which are not conventional (battery) systems, have to meet additional requirements relating to the conditions in which laying hens are kept (enriched cages). The new Schedule 3D to the principal Regulations applies to all systems for keeping laying hens. It provides for general requirements regarding inspection, sound levels, lighting, cleansing and construction of cages.