> inside of a company or organization,

Corps and cities are very similarly structured. Each are charted at the start, with corps getting governed by boards and c-suite types while cities have mayors and city council types. Both file paperwork to exist within the state. Both are subject to state laws, but are allowed to make up regulations specific to them as long as they are within the state's laws.

In the end, it's all just paperwork, at least in the US