state as corporator

when a government becomes a partner in any trading company, it devests itself, so far as concerns the transactions of that company, of its sovereign character, and takes that of a private citizen. Instead of communicating to the company its privileges and its prerogatives, it descends to a level with those with whom it associates itself, and takes the character which belongs to its associates, and to the business which is to be transacted... As a member of a corporation, a government never exercises its sovereignty. It acts merely as a corporator.