Tennessee Constitution Art. II, § 26

No Judge of any Court of law or equity, Secretary of State, Attorney General, Register, Clerk of any court of Record, or person holding any office under the authority of the United States, shall have a seat in the General Assembly; nor shall any person in this State hold more than one lucrative office at the same time; provided, that no appointment in the Militia, or to the office of Justice of the Peace, shall be considered a lucrative office, or operative as a disqualification to a seat in either House of the General Assembly. This section shall not apply with regard to the Speaker of the Senate or the Speaker of the House of Representatives temporarily discharging the powers and duties of the office of Governor as Acting Governor under Article III, Section 12.