Authorize certain cities and villages to sell waterworks, sewer systems, and water systems

This bill allows certain Nebraska cities and villages (classified as primary, first, or second class, or villages) to sell their water and sewer systems to federally recognized or state-acknowledged Indian tribes. To do so, the systems must be entirely located on tribal land, and the sale must be approved by local voters in a general or special election. The bill requires cities/villages to submit the sale proposal to voters at existing elections, with results counted like any other local vote. It does not change who owns these systems but creates a process for their transfer under specific conditions.