Maryland Statutes
Part V - Security for Taxes
Section 13-831 - Release of Surety

(a)    Except for a liability that has accrued or will accrue before the date of release or discharge, a surety is released and discharged from liability on a bond to the State 60 days after the surety submits to the tax collector a written request for release or discharge.
    (b)    On receipt of a written request from a surety for release and discharge, the tax collector promptly shall give the person who posted the bond notice that:
        (1)    the surety has asked to be released and discharged from liability on the bond; and
        (2)    a substitute security must be filed before the date on which the surety is released and discharged under subsection (a) of this section.