As Derby’s population nears 25,000, the milestone is not just a marketing feature, it also is a legal one.

At that point, it becomes what is known in Kansas as a “city of the first class” and mandatory requirements kick in.

The state has three city classifications: first, second and third, each designated by population level. State officials can’t recall the last time it took place, but it has been decades at least. …

One significant impact of conversion, [City Attorney Jacque] Butler said, will be the voiding of most of Derby’s current charter ordinances.

That’s because the existing charter ordinances are tied to statutes governing cities of the second class.

(Read more: Derby News | derbyinformer.com)