Section 27-2146. Validity of lien; grounds for challenge

a.  In  any
  proceedings to enforce or discharge the lien, the validity of  the  lien
  shall not be subject to challenge based on:
    (1) The lawfulness of the repair or other work done; or
    (2)  The  propriety  and  accuracy  of the expense for which a lien is
  claimed, except as provided in this section.
    b. No challenge may be made except by (1) the owner of  the  property,
  or  (2)  a mortgagee or lienor whose mortgage or lien would, but for the
  provisions of section 27-2144 of this article, have  priority  over  the
  department's lien.
    c.  An  issue  specified  in subdivision a which was decided, or could
  have been contested, in a prior court proceeding to secure a court order
  to repair under article  five  of  this  subchapter  or  to  secure  the
  appointment  or  the  discharge  of a receiver under article six of this
  subchapter, shall not be open to reexamination, but if any mortgagee  or
  lienor  entitled  to  notice of such prior proceeding was not served and
  did not appear therein, his or her mortgage or lien shall have  priority
  over  the  lien  of  the  department. In addition to this limitation, an
  owner who has been served with a statement pursuant to  section  27-2129
  of  article  five  of this subchapter, or his successor in interest, may
  not subsequently contest the expense contained therein unless such owner
  or successor in interest notified the department in writing  of  his  or
  her  objection  to the statement of account in the manner and within the
  time period  provided  in  section  27-2129  of  article  five  of  this
  subchapter.
    d.  With  respect to any issue specified in subdivision a which is not
  subject to subdivision c, the statement of the department made  pursuant
  to  section 27-2145 of this article shall be presumptive evidence of the
  facts stated therein.