Texas Local Government Code - LOC GOV'T § 81.002. Oath, Bond

(a) Before undertaking the duties of the county judge or a county commissioner, a person must take the official oath and swear in writing that the person will not be interested, directly or indirectly, in a contract with or claim against the county except:

(b) A commissioner must execute a bond, payable to the county treasurer, in the amount of $3,000. The bond must be approved by the county judge and must be conditioned on the faithful performance of the commissioner's official duties. The bond must also be conditioned that the commissioner:

(c) Subject to the provisions of Chapter 171, the county judge or a county commissioner may serve as a member of the governing body of or as an officer or director of an entity that does business with the county, excluding a publicly traded corporation or a subsidiary, affiliate, or subdivision of a publicly traded corporation.