No relative shall be held legally liable to support or to contribute to the support of any applicant for or recipient of aid under this chapter. No relative shall be held liable to defray in whole or in part the cost of any medical care or hospital care or other service rendered to the recipient pursuant to any provision of this code if he is an applicant for or a recipient of aid under this chapter at the time such medical care or hospital care or other service is rendered.
Notwithstanding Sections 3910, 4400, and 4401 of the Family Code, or Section 270c of the Penal Code, or any other provision of this code, no demand shall be made upon any relative to support or contribute toward the support of any applicant for or recipient of aid under this chapter. No county or city and county or officer or employee thereof shall threaten any such relative with any legal action against him by or in behalf of the county or city and county or with any penalty whatsoever.