Md. Code, Alcoholic Beverages and Cannabis § 6–207

(a) In this section, “tetrahydrocannabinol” has the meaning stated in § 36–1102 of this article.

(b) In a prosecution for selling alcoholic beverages or tetrahydrocannabinol without an appropriate license, proof that the defendant displayed or offered alcoholic beverages or tetrahydrocannabinol for sale, or kept a place of business where alcoholic beverages or tetrahydrocannabinol were displayed or offered for sale, is prima facie evidence that the defendant sold alcoholic beverages or tetrahydrocannabinol.