(a) When prohibited.--No execution shall issue against, nor shall any levy be made upon, any real or personal property of the estate of a decedent by virtue of a judgment against him or his personal representative unless:
(1) agreed to by the personal representative in a writing filed in the action or proceeding; or
(2) approved by the orphans' court division of the county in which letters testamentary or of administration have been granted, or if none have been granted, then by the orphans' court division of the county in which the principal or family residence of the decedent was located. The court may require the giving of notice to the personal representative and to parties in interest or may waive all notice.
(b) When allowed.--The restrictions of subsection (a) of this section shall not apply to actions or proceedings to enforce mortgages, ground rents, pledges, or conditional sales of real or personal property.