Nebraska Revised Statute 52-2106
Lien; period of enforceability.
(1) Except as provided in subsections (2) and (3) of this section, a lien that has become enforceable as provided in section 52-2103 shall continue to be enforceable for two years after the recording of the lien.
(2) Except as provided in subsection (3) of this section, if an owner, holder of a security interest, mortgage, or trust deed, or other person having an interest in the commercial real estate gives the commercial real estate broker written demand to institute a judicial proceeding within thirty days, the lien lapses unless, within thirty days after receipt of the written demand, the commercial real estate broker institutes judicial proceedings.
(3) If a judicial proceeding to enforce a lien is instituted while a lien is effective under subsection (1) or (2) of this section, the lien continues during the pendency of the proceeding.