Maryland Commercial Law Section 9-618
§ 9-618.
  (a)   A secondary obligor acquires the rights and becomes obligated to perform the duties of the secured party after the secondary obligor:
    (1)   Receives an assignment of a secured obligation from the secured party;
    (2)   Receives a transfer of collateral from the secured party and agrees to accept the rights and assume the duties of the secured party; or
    (3)   Is subrogated to the rights of a secured party with respect to collateral.
  (b)   An assignment, transfer, or subrogation described in subsection (a):
    (1)   Is not a disposition of collateral under § 9-610; and
    (2)   Relieves the secured party of further duties under this title.