Md. Code, Bus. Reg. § 16.7-204

(a) An electronic smoking devices manufacturer license authorizes the licensee to: (1) sell electronic smoking devices to: (i) a licensed electronic smoking devices wholesaler located in the State; (ii) an electronic smoking devices wholesaler or retailer located outside the State if the electronic smoking devices may be sold lawfully in Maryland; and (iii) a licensed vape shop vendor; (2) if the electronic smoking devices manufacturer licensee also holds a license to act as an electronic smoking devices retailer or a vape shop vendor, transfer electronic smoking devices to inventory for sale under the retail license or vape shop license; and (3) except as otherwise prohibited or restricted under local law, this article, or the Criminal Law Article, distribute electronic smoking devices products to a licensed electronic smoking devices retailer or vape shop vendor. (b) An electronic smoking devices retailer license authorizes the licensee to: (1) sell electronic smoking devices to consumers; (2) buy electronic smoking devices from an electronic smoking devices wholesaler distributor or electronic smoking devices wholesaler importer; (3) if the electronic smoking devices retailer licensee also holds a license to act as an electronic smoking devices manufacturer, sell at retail electronic smoking devices manufactured under the manufacturer license; and (4) except as otherwise prohibited or restricted under local law, this article, the Criminal Law Article, or § 24–305 of the Health – General Article, distribute sample electronic smoking devices products to consumers in the State. (c) An electronic smoking devices wholesaler distributor license or electronic smoking devices wholesaler importer license authorizes the licensee to: (1) sell electronic smoking devices to electronic smoking devices retailers and vape shop vendors; (2) buy electronic smoking devices directly from an electronic smoking devices manufacturer and an electronic smoking devices wholesaler distributor or electronic smoking devices wholesaler importer; (3) hold electronic smoking devices; and (4) sell electronic smoking devices to another licensed electronic smoking devices wholesaler distributor or electronic smoking devices wholesaler importer. (d) A vape shop vendor license authorizes the licensee to: (1) sell electronic smoking devices as a vape shop vendor to consumers on the premises of the licensee’s place of business; (2) if the vape shop vendor licensee also holds a license to act as an electronic smoking devices manufacturer, sell at retail on the vape shop vendor premises electronic smoking devices manufactured under the manufacturer license; and (3) buy electronic smoking devices from an electronic smoking devices manufacturer, an electronic smoking devices wholesaler distributor, or an electronic smoking devices wholesaler importer.