No licensee authorized under this chapter to sell alcoholic beverages to wholesalers or retailers shall
All price lists or price quotations made to a licensee by a wholesaler shall remain in effect for at least thirty days after the establishment of such price list or quotation. Any sale by a wholesaler of any alcoholic beverages at prices lower than the price reflected in such price list or quotation within such thirty day period shall constitute price discrimination under this section.
Mass. Gen. Laws ch. 138, § 25A