Org Hierarchy

Org Hierarchy

The specs specify:

"The explicit hierarchy is: national -> state -> local -> district -> school.
Note that a 'department' may be inserted below any entity other than national and above any entity other than national and state i.e. national -> state-> department -> local -> department -> district -> department -> school -> department."

My question is: Is it within spec to skip levels? That is, can a school have a parentSourcedId of a national org, or are all the intermediate orgs steps required?