Paragraph 6
England and Wales
If systems are used where the laying hens can move freely between different levels—
(a)
there must be no more than four levels;
(b)
the headroom between the levels must be at least 45 cm;
(c)
the drinking and feeding facilities must be distributed in such a way as to provide equal access for all hens; and
(d)
the levels must be so arranged as to prevent droppings falling on the levels below.