Maryland Environment Section 14-305

      A person may not drill, bore, drive, dig, or otherwise conduct any operation for the purpose of obtaining access to a pocket or other underground area for the purpose of storing natural or artificial gas or petroleum products and their derivatives, unless a permit for the operation, construction, and storage has been first obtained from the Department. Nothing in this subtitle shall be construed to apply to the installation or maintenance of underground tanks or vessels commonly used to store these products.