6. The business operator must ensure that—
(a)a sufficient number of pens are provided at the premises for adequate lairaging of animals with protection from the effects of adverse weather conditions; and
(b)a lairage has—
(i)a floor which minimises the risk of slipping and which does not cause injury to an animal which is in contact with it;
(ii)adequate ventilation to ensure that temperature, air relative humidity and ammonia levels are kept within limits that are not harmful to an animal, taking into account the extremes of temperature and humidity which may be expected;
(iii)where ventilation is provided other than naturally, a replacement means of maintaining adequate ventilation available for use if the original source of ventilation fails;
(iv)adequate lighting (whether fixed or portable) to enable animals to be thoroughly inspected at any time;
(v)where necessary, suitable equipment for tethering animals; and
(vi)drinking facilities and racks, mangers or other equipment adequate in number and size for the watering and feeding of all animals confined in the lairage, fixed where practicable, and constructed and placed so that they are easily accessible to all the animals, can readily be filled and cannot readily be fouled.