For the purposes of this subsection, "furnish" shall mean to knowingly or intentionally supply, give or provide to or allow a person less than 21 years of age, except for the children and grandchildren of the person being charged, to possess marijuana, marijuana products or marijuana accessories on premises or property owned or controlled by the person charged.
This subsection shall not apply to the sale, delivery or furnishing of medical marijuana pursuant to chapter 369 of the acts of 2012.
Mass. Gen. Laws ch. 94G, § 13