The department shall enter into an agreement with the Secretary of Health, Education and Welfare under which such secretary will determine eligibility for Medi-Cal in the case of aged, blind or disabled persons under this state's medical assistance plan approved under Title XIX of the Social Security Act. The state shall pay the Secretary of Health, Education and Welfare an amount equal to one-half of the cost of carrying out the agreement, but in computing such cost with respect to individuals eligible for benefits under Title XVI of the Social Security Act, such payment shall include only those costs which are additional to the costs incurred in carrying out such title.
Ca. Welf. and Inst. Code § 14101.1