Tenn. Code Ann. § 7-69-105

A majority of the board of the authority shall constitute a quorum for the transaction of any business. Unless a greater number or percentage is required, or otherwise by state law, the vote of a simple majority of the directors of the authority present at any meeting at which a quorum is present shall be the action of the authority. The board may participate by electronic or other means of communication for the benefit of the public and the board in connection with any meeting authorized by law. To the extent such participation occurs, § 8-44-108 shall apply.