11. No person shall convey or cause to be conveyed milk or cream from the farm of a producer to a factory unless he holds a transportation permit issued by the Board, in the form and on the conditions prescribed by regulation. Such permit may indicate the territory in which the transporter may act as such.
Such provisions shall not apply to a producer transporting the milk produced by his herd nor to a producer transporting gratuitously, in addition to the milk produced by his herd, the milk produced by the herds of not more than six of his neighbours, under the terms of an agreement whereby such producers transport in turn the milk produced by their herds.