Each importer and distributor shall file with the director a written schedule of prices to be charged by such person for wine imported into or sold within this state for resale therein. Such schedule of prices shall be uniform for buyers in the same trade area within this state, and shall set forth the following:
(1) All brands and types of products offered for sale;
(2) The delivered sale price thereof in the several trade areas of the state; and
(3) Any allowance granted for returned containers. an increase in prices, for a minimum period of thirty (30) days;
(4) a reduction in prices for a minimum period of six (6) months.
Such schedule of prices so filed may be changed or modified from time to time by filing with the director a new schedule of prices, not less than ten (10) days prior to the last day of the filing calendar month, becoming effective on the first day of the succeeding calendar month. Upon the filing of said new prices, the director shall give notice thereof to all importers and distributors. Such schedule of prices so filed may not be withdrawn prior to its effective date, and upon becoming effective shall remain in effect as follows:
Upon the filing of the original schedule of prices, and after the effective date of any schedule of prices amendatory thereto, all prices therein stated shall be strictly adhered to. Amendatory schedules shall recite the information required in the above subsections (a), (b) and (c).