This is a positive... This shell-game protects PTSC and TPL from each other. An external entity cannnot make an end run by acquiring one or the other separately...this does not preclude a joint offer for the public (PTSC) and private (TPL) entities together, where the offer is one that is mutually agreed upon.
n.b. it says "In the event of a Change of Control of Patriot or TPL..."