42.—(1) A child under two years shall not be present at a place of performance—
(a)for more than three hours a day;
(b)before half-past nine in the morning or after four in the afternoon.
(2) Such a child shall not take part in a performance on any day—
(a)for a continuous period of more than twenty minutes without an interval for rest;
(b)for a total period of more than one hour.
(3) Any time during which such a child is present at a place of performance, but is not taking part in a performance, shall be used for the purposes of meals, rest and recreation.