For paragraph (c) of section 18(1) of the principal Act (which prohibits the employment of children before six o'clock in the morning or after eight o'clock in the evening) and for paragraph (c) of section 28(1) of the principal Scottish Act (which prohibits such employment before six o'clock in the morning or after seven o'clock in the evening, or at certain times of the year eight o'clock in the evening) there shall be substituted the following paragraph:—

“(c)

before seven o'clock in the morning or after seven o'clock in the evening on any day ; or”.