(a) HHSC determines income eligibility for the Medicaid for Parents and Caretaker Relatives Program after application of the methodology in Subchapter K of this chapter (relating to Modified Adjusted Gross Income Methodology). (b) To be eligible for the Medicaid for Parents and Caretaker Relatives Program, an applicant or recipient must have household income for the applicable household size that is equal to or less than the amount determined by HHSC and listed in the Texas Works Handbook.