Texas Government Code - GOV'T § 497.022. Contracts

(1) another state, the federal government, a foreign government, or an agency of any of those governments to manufacture for or sell to those governments prison-made articles or products;

(2) a private or independent institution of higher education to manufacture for or sell to that school or institution prison-made articles or products;  or

(3) a private school or a person with visual impairment in this state to manufacture Braille textbooks or other instructional aids for the education of persons with visual impairment.