(a) For persons receiving Title IV-D services, the Title IV-D agency will review the support order for modification every three years:
  (1) for a TANF case;
  (2) at the request of either parent for a post-assistance or Medical Assistance-Only case; or
  (3) at the request of either parent for a case in which the parent has applied for Title IV-D services.
(b) After such review and if appropriate, the Title IV-D agency will adjust the support order in accordance with Texas Family Code, §156.401.
(c) The Title IV-D agency may review and adjust the support order sooner than three years, if there has been a material change in circumstances of the child or persons affected by the support order as allowed by Texas Family Code, §156.401.

Source Note: The provisions of this §55.851 adopted to be effective March 30, 2008, 33 TexReg 2535