2.—(1) A pig shall be free to turn round without difficulty at all times.
(2) The dimension of any stall or pen shall be such that the internal area is not less than the square of the length of the pig, and no internal side is less than seventy five per cent of the length of the pig, the length of the pig in each case being measured from the tip of its snout to the base of its tail while it is standing with its back straight.
(3) This paragraph shall not apply in relation to a female pig for the period between seven days before the predicted day of her farrowing and the day on which the weaning of her piglets (including any piglets fostered by her) is complete.
(4) A person shall not be guilty of an offence under this paragraph by reason of the keeping of a pig in a stall or pen—
(a)while it is undergoing any examination, test, treatment or operation carried out for veterinary purposes;
(b)for the purposes of service, artificial insemination or collection of semen;
(c)while it is fed on any particular occasion;
(d)for the purposes of marking, washing or weighing it;
(e)while its accommodation is being cleaned;
(f)while it is awaiting loading for transportation,
provided that the period during which it is so kept is not longer than necessary for the purpose in view.
(5) A pig shall not be regarded as being kept in a stall or pen in which it could not be kept without contravention of this paragraph if it is in a stall or pen which it can enter or leave at will, provided that the stall or pen is entered from a stall or pen in which the pig is kept without contravention of this paragraph.
(6) This paragraph shall not apply in relation to the use on any land before 1st January 1999 of any stall or pen which was in use on that land before 1st October 1991.