Maryland Environment Section 9-937
§ 9-937.
  By resolution of its board of directors, an authority may provide for the issuance of:
    (1)   Refunding bonds to refund any bonds of the authority that were issued under this subtitle and are outstanding; or
    (2)   A single issue of bonds to:
      (i)   Pay the cost of a project or of the improvement, extension, or reconstruction of or additions to a project; and
      (ii)   Refund bonds that:
        1.   Were issued under this subtitle and are outstanding; and
        2.   Have matured, are subject to redemption, or can be retired.