Cal. Welf. & Inst. Code § 11101

When a recipient of public assistance is absent from the United States for a period in excess of 30 days, his aid shall thereafter be suspended whenever need cannot be determined for the ensuing period of his absence from the United States. No person shall be considered absent from the United States in accordance with this section if he is residing in any of the states, territories, possessions or other districts eligible to receive grants-in-aid from the federal government under the Social Security Act.