Nebraska Statutes: 17-405
17-405. Contiguous land; annexation; petition; plat; approval of council; recording; effect. (1) Whenever the owner or owners and inhabitants, or a majority thereof in numbers or value, of any territory lying contiguous to the corporate limits of any city or village, whether the territory be already in fact subdivided into lots or parcels of ten acres or less or remains unsubdivided, except as provided in section 13-1115, shall desire to annex such territory to any city or village, they shall first cause an accurate plat or map of the territory to be made, showing such territory subdivided into blocks and lots, conforming as nearly as may be to the blocks, lots, and streets of the adjacent city or village. It shall also show the descriptions and numberings, as provided in section 17-415, for platting additions, and conforming thereto as nearly as may be.
(2) Said plat or map shall be prepared under the supervision of the city engineer in cases of annexation to adjacent cities, and under the supervision of a competent surveyor in any case. A copy of said plat or map, certified by said engineer or surveyor, as the case may be, shall be filed in the office of the clerk of the city or village, together with a request in writing, signed by a majority of the property owners and inhabitants in number and value of the territory described in said plat for the annexation of said territory. The city council or board of trustees shall, at the next regular meeting thereof after the filing of such plat and request for annexation, vote upon the question of such annexation, and such vote shall be spread upon the journal of said council or board of trustees. If a majority of all the members of the council or board of trustees vote for such annexation, an ordinance shall be prepared and passed by the council or board declaring the annexation of such territory to the corporate limits of the city or village, and extending the limits thereof accordingly.
(3) An accurate map or plat of such territory certified by the engineer or surveyor, and acknowledged and proved as provided by law in such cases shall at once be filed and recorded in the office of the county clerk or register of deeds and county assessor of the proper county, together with a certified copy of the ordinance declaring such annexation, under the seal of the city or village. Thereupon such annexation of such adjacent territory shall be deemed complete, and the territory included and described in the plat on file in the office of the clerk or register of deeds shall be deemed and held to be a part of said original corporate city or village, and the inhabitants thereof shall thereafter enjoy the privileges and benefits of such annexation, and be subject to the ordinances and regulations of said city or village.