Let's say you represent a human organisation with a tree data structure (organisation of a company, or for example for the USA you have the federal state then Texas inside it, then the county, then the township, etc.).
How would you say "This entity does not have anything inside it, it's a leaf or a terminal node in my tree structure" without using computer science term. If we were speaking about a genealogy tree it would be "This person did not have any child". Only I want a term that is applicable for an administrative entity, inside other administrative entities, not a person.
How is it possible to tell "The Escuadra de maniobra does not rule over any other spanish military entity" or "The civil township is one of the possible lowest level of administrative division in the USA"?