The provisions of this subchapter shall apply to any handler, manufacturer, distributor, producer, wholesale customer including any producer-distributor or non-profit cooperative association acting as a handler, manufacturer, distributor, or consumer or any representative of them, that solicits, or colludes with, or jointly participates with, any other person to commit any of the unlawful practices provided for in this subchapter, or that uses any misrepresentation, threat, intimidation or boycott to effectuate the commission of such unlawful practices. Any provision of this subchapter that applies to a distributor shall apply equally to a wholesale customer that buys packaged milk, cream, or any dairy product for resale to other wholesale customers.