Tex. Loc. Gov't Code § 379H.159

The board of a land bank may adopt a policy requiring that a percentage, as determined by the board based on local needs and available land bank inventory, of residential units constructed on residential real property conveyed by the land bank be deed restricted for housing that is affordable to households with an income of not greater than 80 percent of the area median family income, adjusted for household size, for the municipality, as determined annually by the United States Department of Housing and Urban Development.