It shall be an unfair trade practice for any dealer in a marketing area to sell or otherwise dispose of milk at prices which the Commissioner of Agriculture finds, after notice and opportunity for hearing, before him or his designated agent, create a condition of emergency by disrupting and undermining or tending to disrupt and undermine the prices required hereunder to be paid by such dealer or by other dealers for milk received or purchased from producers, or by imperiling the ability of such dealer or other dealers to make full and prompt payment for such milk.