Maryland Commercial Law Section 9-704
§ 9-704.
  A security interest that is enforceable immediately before this title takes effect but which would be subordinate to the rights of a person that becomes a lien creditor at that time:
    (1)   Remains an enforceable security interest for one year after this title takes effect;
    (2)   Remains enforceable thereafter if the security interest becomes enforceable under § 9-203 when this title takes effect or within one year thereafter; and
    (3)   Becomes perfected:
      (A)   Without further action, when this title takes effect if the applicable requirements for perfection under this title are satisfied before or at that time; or
      (B)   When the applicable requirements for perfection are satisfied if the requirements are satisfied after that time.