Neb. Rev. Stat. § 13-328

A county which encompasses a city of the metropolitan class or city of the primary class shall not cede or transfer extraterritorial jurisdiction over land to a city of the first or second class or village if, on the date the county receives a request pursuant to subsection (1) of section 13-327 , such land lies within the area extending three miles from the extraterritorial jurisdiction boundaries of such city of the metropolitan class or city of the primary class.