Versions of Nebraska Statutes 57-1621. Agreements with government entities and state agencies; contracts authorized on LawServer 2023 Nebraska Statutes 57-1621. Agreements with government entities and state agencies; contracts authorized 2022 Nebraska Statutes 57-1621. Agreements with government entities and state agencies; contracts authorized 2021 Nebraska Statutes 57-1621. Agreements with government entities and state agencies; contracts authorized