§9–303.

    (a)    This section applies if there is a conflict between a custody order of a court of this State and a custody order of a court of another state.

    (b)    Except as provided in subsection (c) of this section, a custody order of a court of this State prevails over a custody order of a court of another state.

    (c)    A custody order of a court of another state prevails over a custody order of a court of this State if the court in the other state passed its custody order:

        (1)    after the custody order was passed by a court of this State; and

        (2)    in proceedings in which the lawful custodian under the custody order of a court of this State:

            (i)    consented to the custody order passed by the court of the other state; or

            (ii)    participated personally as a party.