Is: may or may not be owned by the company. (no information here: law of excluded middle)
Should be: replace /or may not/ with "but need not"
Or did you want to say that either all foreign assets either are owned simultaneously or none is owned? Such a rule does not make much sense to me but I am not a manager so I cannot be sure.
Or did you want to say that the law of excluded middle is not obviously valid here because it can be undecidable whether an asset may be owned or not? Have you been to Poland recently? (just kidding…)