37.—(1) A child who has attained the age of thirteen years shall not be present at a place of performance—
(a)for more than eight hours a day;
(b)before nine in the morning or after seven in the evening, except that a child may be present after half-past eight in the morning if on the preceding day he was not present after half-past six in the evening.
(2) Such a child shall not take part in a performance on any day—
(a)for a continuous period of more than one hour without an interval for rest;
(b)for a total period of more than three and a half hours.
(3) Such a child shall not be present at a place of performance for more than four consecutive hours without there being two or more intervals of which one shall be for the purpose of a meal and shall be of not less than one hour and the other or others shall be for the purpose of rest and shall not be less than fifteen minutes.