Chap. 769. 685 : (2) 'No milk dealer shall discriminate in prices in the sale of any milk between or within any of the cities or towns of the commonwealth with the intent or with the effect of unfairly diverting trade from a competitor or otherwise injuring a competitor or of destroying or lessening competition; provided, that no violation will result from different prices which reflect the actual transportation cost from the point of processing or purchase to the point of resale; and provided further, that prices made in good faith to meet competition in such city or town shall not be in violation of this paragraph. Proof of advertising, offering for sale, or selling any such milk in any one of such cities or towns at prices less than advertised, offered for sale or sold in any other such city or town by such person which cannot be accounted for as necessary to meet competition shall be prima facie evidence of violation of the provisions of this paragraph. (3) No milk dealer shall discriminate between purchasers or between or within localities, as set forth in paragraphs (1) and (2) of this subsection by any scheme of rebates, refunds, commissions or discounts whether in the form of money or otherwise, or in the form of extending tti certain purchasers special services or privileges not extended to all other purchasers in the same category. (4) No milk dealer shall make or renew any money loan to a store. ¦ (5) No milk dealer shall extend credit to any store in excess of thirty days payable fifteen days thereafter. Whoever violates any provision of this subsection shall be punished by a fine of not less than fifty nor more than two hundred dollars. It shall be a defense under any of the provisions of this subsection if prices are charged or other action taken for the purpose of meeting competition in good faith. It shall be a defense under any of the provisions of paragraphs (1), (2) or (3), if the price differentials involved make only due allowance for differences in the cost of manufacture, sale, or delivery, resulting from the differing methods or quantities in which such commodities are sold or delivered. The burden of proof with respect to the above two defenses shall be on the milk dealer. The provisions of this subsection shall not apply to sales to federal, state or municipal governmental bodies or agencies, or to schools, colleges, universities, libraries, churches, hospitals and charitable institutions, not operated for profit. Approved December 6, 1967. Chap. 7G9. An Act authorizing the purchase of group annuities FOR EMPLOYEES OP THE DEPARTMENT OF EDUCATION AND OF PUBLIC EDUCATIONAL INSTITUTIONS IN THE COMMONWEALTH. Be it enacted, etc., as follows: Section 1. Section 18A of chapter 15 of the General Laws, inserted by. section 1 of chapter 466 of the acts of 1963, is hereby amended by inserting after the word "individual", in lines 14 and 15, the words: — or group. Section 2. The last sentence of section 31 of chapter 29 of the General Laws, added by section 2 of said chapter 466, is hereby amended by. inserting after the word "individual", in line 3, the words: — or group. 686 Acts, 1967.—Chaps. 770, 771. Section 3. The paragraph denning "Regular compensation" in section 1 of chapter 32 of the General Laws is hereby amended by striking out the last sentence, added by section 5 of said chapter 466, and inserting in place thereof the following sentence: — Regular compensation shall also include all premiums paid by any governmental unit for the purchase of an individual or group annuity contract as authorized by section eighteen A of chapter fifteen or section thirty-seven B of chapter seventy-one. . Section 4. Section 37B of chapter 71 of the General Laws, inserted by section 3 of said chapter 466, is hereby amended by inserting after the word "individual", in line 2, the words: — or group, and by adding the following sentence: — A school committee shall not offer to a teacher any annuity plan to the exclusion of any other plan, whether group or individual. Section 5. Clause (a) of the first paragraph of section 132A of chapter 175 of the General Laws, as appearing in section 1 of chapter 313 of the acts of 1945, is hereby amended by inserting after the word "jointly", in line 8, the words: — ; provided, however, that this clause shall not apply to any group annuity plan to which the provisions of section 403 (6) of the Internal Revenue Code apply. Approved December 5, 1967.