Tex. Loc. Gov't Code § 143.305

An agreement made under this subchapter is a public record for purposes of Chapter 552, Government Code. The agreement and any document prepared and used by the municipality in connection with the agreement are available to the public under the open records law, Chapter 552, Government Code, only after the agreement is ratified by the municipality's governing body. This section does not affect the application of Subchapter C, Chapter 552, Government Code, to a document prepared and used by the municipality in connection with the agreement.