When the Court is satisfied that the said notice has been duly served on the vendor or mortgagee, the proceedings shall be filed.

Suits for pre-emption Any person entitled to a right of pre-emption may, when the sale or foreclosure has been completed, bring a suit to enforce that right.

21-A. When improvement of status of a vendor after institution of suit not to affect right of pre-emptor [Any improvement, otherwise than through inheritance or succession, made, in the status of a vendee defendant after the institution of a suit for pre-emption shall not affect the right of the pre-emptor plaintiff in such suit.]