Maryland Commercial Law Section 11-601
§ 11-601.
  (a)   In this subtitle the following words have the meanings indicated.
  (b)   "Container" means a liquefied petroleum gas container.
  (c)   "Liquefied petroleum gas" means any material which is composed predominately of any of the following hydrocarbons or mixtures of them:
    (1)   Propane;
    (2)   Propylene;
    (3)   Normal butane;
    (4)   Isobutane; or
    (5)   Butylenes.
  (d)   "Mark" includes any name, initial, or other device.
  (e)   "Marked container" means a container which bears on its surface in plainly legible characters the mark of its owner.
  (f)   "Owner" means:
    (1)   Any person who holds a written bill of sale under which title or ownership to a container was transferred to him; or
    (2)   Any manufacturer of a container who has not transferred ownership of the container under a written bill of sale.
  (g)   "Person" includes an individual, corporation, business trust, estate, trust, partnership, association, two or more persons having a joint or common interest, or any other legal or commercial entity.