Neb. Rev. Stat. §§ 14-101
All cities in this state which have attained a population of four hundred thousand inhabitants or more as determined by the most recent federal decennial census or the most recent revised certified count by the United States Bureau of the Census shall be cities of the metropolitan class and governed by sections 14-101 to 14-2004. The population of a city of the metropolitan class shall consist of the people residing within the territorial boundaries of such city and the residents of any territory duly and properly annexed to such city. Each city of the metropolitan class shall be a body corporate and politic and shall have power (1) to sue and be sued, (2) to purchase, lease, lease with option to buy, acquire by gift or devise, and hold real and personal property within or without the limits of the city for the use of the city, and real estate sold for taxes, (3) to sell, exchange, lease, and convey any real or personal property owned by the city, in such manner and upon such terms as may be in the best interests of the city, except that real estate acquired for state armory sites shall be conveyed strictly in the manner provided in sections 18-1001 to 18-1006, (4) to make all contracts and do all other acts in relation to the property and concerns of the city necessary for the exercise of its corporate or administrative powers, and (5) to exercise such other and further powers as may be conferred by law. The powers granted under this section shall be exercised by the mayor and city council of such city except when otherwise specifically provided.
Neb. Rev. Stat. §§ 14-101