Section 9F. The department of public health may make rules and regulations to carry out sections nine G to nine M, inclusive. Said sections and the rules and regulations shall be enforced by said department and by the local boards of health acting under the supervision of said department; provided, that the provisions of sections nine G and nine H relating to the health of employees shall be enforced by the department of labor and workforce development in accordance with such rules and regulations as it may prescribe. Sections nine G, nine H, nine J and nine M shall not apply to retail stores where bakery products are sold but not produced.