Determining market demand—No undue discrimination in proration of "allowable."
The department shall not be required to determine the reasonable market demand applicable to any single pool of oil except in relation to all pools producing oil of similar kind and quality and in relation to the reasonable market demand. The department shall prorate the "allowable" in such manner as will prevent undue discrimination against any pool or area in favor of another or others resulting from selective buying or nomination by purchasers.