Texas Human Resources Code - HUM RES § 22.019. Due Process Procedures

(a) The commission and the department may not retroactively apply a rule, standard, guideline, or policy interpretation under this title.

(b) Any changes in agency policy shall be adopted in accordance with the rulemaking provisions of Chapter 2001, Government Code.  Periodic bulletins and indexes shall be used to notify contractors of changes in policy and to explain the changes.  A change in agency policy may not be adopted if it takes effect before the date on which contractors are notified as prescribed by this subsection.

(c) The executive commissioner shall adopt a rule requiring the commission or the department, as applicable, to respond in writing to each written inquiry from a contractor under this title not later than the 14th day after the date on which the commission or the department receives the inquiry.