Maryland Statutes
Title 16 - Maryland Uniform Transfer-on-Death (Tod) Security Registration Act
Section 16-106 - Registration in Beneficiary Form -- Effect

(a)    The designation of a TOD beneficiary on a registration in beneficiary form has no effect on ownership until the owner’s death.
    (b)    A registration of a security in beneficiary form may be canceled or changed at any time by the sole owner or all then surviving owners without the consent of the beneficiary.