S.L. 439.1 Art. 5behavioural or artificial period at least 9 a.m. and 5 to allow the

Calves must not be kept permanently in darkness. To meet their and physiological needs, provision must be made for appropriate natural lighting. In the case of artificial lighting, it must function for a equivalent to the period of natural light normally available between p.m. In addition, suitable lighting (fixed or portable) strong enough calves to be inspected at any time must be available.