12.1. The aluminum plant contemplated in subparagraph c of section 12, any property relating to the plant and any property useful for its operation may belong to several owners in undivided ownership.
The owners may enter into agreements respecting the exercise of their rights, the administration of the undivided property and their enjoyment of it or the operations carried on by them on it. The agreements do not result in transforming the undivided ownership into a partnership.