Change provisions relating to improvement districts in cities of the first class

This bill amends Nebraska law (sections 16-617 to 16-624) governing improvement districts in cities of the first class. It updates procedures for creating districts - including allowing inclusion of properties within city limits, adjacent areas, and county industrial zones - and modifies notice requirements (20 days in a newspaper) and objection rules (50% of front footage must object within 20 days to halt projects). The bill also revises how materials for street improvements are selected, requiring city councils to consider petitions from 25% of abutting property owners and allowing a 10-day delay in bid decisions. These changes affect city governments and property owners in first-class cities where street, sidewalk, or public space improvements are funded through special assessments.