Tex. Bus. Orgs. Code § 9.204

A vote cast or consent provided by a foreign entity with respect to its ownership or membership interest in a domestic entity of which the foreign entity is a lawful owner or member, and the foreign entity's participation in the management and control of the business and affairs of the domestic entity to the extent of the participation of other owners or members, are not invalidated if the foreign entity does not register to transact business in this state in accordance with this chapter, subject to all law governing a domestic entity, including the antitrust law of this state.