applications – Can unmanaged apps be updated with an InstallApplication command (or otherwise)?

On Apple’s device management docs for the InstallApplication command, it states:

If the app is a managed app, this command updates it.

Presumably this means that if the app is not managed, then it will not be updated. Is that true? Not sure whether “if” means “if and only if” in this case.

If it indeed will not be updated, does this also mean that unmanaged apps can’t be updated through MDM?