It shall be the responsibility of a recipient changing residence from one county to another within the state to promptly notify the county paying aid to the recipient of the move and to apply for a redetermination of eligibility within the new county of residence. The first county shall notify the second county of the recipient’s move as soon as the recipient’s location in the second county is known. The county to which the recipient has moved will be responsible for determining the recipient’s continued eligibility for payment of aid and, to the extent possible, as determined by the Director of Health Services, eligibility for the Medi-Cal program, as of the first day of the month following 30 days after the first county has notified the second county of the recipient’s relocation. The first county shall provide the second county with copies of those documents, as specified by the department, necessary to establish current eligibility and grant amount.