Versions of Nebraska Statutes 30-4624. Powerholder\'s authority to revoke or amend exercise on LawServer 2023 Nebraska Statutes 30-4624. Powerholder’s authority to revoke or amend exercise 2022 Nebraska Statutes 30-4624. Powerholder’s authority to revoke or amend exercise 2021 Nebraska Statutes 30-4624. Powerholder’s authority to revoke or amend exercise