Tenn. Const. art. II, § 18

A bill shall become law when it has been considered and passed on three different days in each House and on third and final consideration has received the assent of a majority of all the members to which each House is entitled under this Constitution, when the respective speakers have signed the bill with the date of such signing appearing in the Journal, and when the bill has been approved by the Governor or otherwise passed under the provisions of this Constitution.