Tex. Loc. Gov't Code § 252.002

Any provision in the charter of a home-rule municipality that relates to the notice of contracts, advertisement of the notice, requirements for the taking of sealed bids based on specifications for public improvements or purchases, the manner of publicly opening bids or reading them aloud, or the manner of letting contracts and that is in conflict with this chapter controls over this chapter unless the governing body of the municipality elects to have this chapter supersede the charter.