Maryland Environment Section 9-809
§ 9-809.
  (a)   (1)   Any bond issued under this subtitle that bears the signatures of the officers in office on the date the bond is signed is a valid and binding obligation notwithstanding that:
      (i)   At the time of delivery of or payment for the bond, any or all of the signers are no longer officers of the municipality; or
      (ii)   Any proceeding that relates to the development of the sewerage facility for which the bond is issued is invalid or irregular.
    (2)   A signature may be by facsimile as provided in § 2-303 of the State Finance and Procurement Article.
  (b)   A recital in the bond that the bond is issued under this subtitle is conclusive evidence of:
    (1)   The validity of the bond; and
    (2)   The regularity of the issuance of the bond.