In the event the Social Security Act or other statutes or regulations adopted by the Department of Health and Human Services are amended to change requirements to entitle the Commonwealth to federal grants or reimbursement for public assistance payments and expenditures for social services, the Board may by regulation adopt such standards, requirements and procedures that would bring the public assistance and social services programs into compliance with the federal requirements so as not to interfere with, diminish or jeopardize the Commonwealth’s entitlement to federal grants or reimbursement for public assistance payments or expenditures for social services. If federal statutes or regulations are amended to permit funds appropriated by Congress to be used for public assistance to or social services for any persons eligible for assistance under §§ 63.2-319 and 63.2-802, the Board may, pursuant to the provisions of § 63.2-217, make applicable such provisions of Subtitles II and III of this title as the Board finds necessary to enable the Commonwealth to receive reimbursement for such public assistance and social services. The Board may also by regulation define eligibility within the limitations of § 63.2-802 of persons to receive public assistance or social services under any amendments of the Social Security Act or other statutes. It is the purpose of this section to enable the Commonwealth to meet the requirements for federal reimbursement of public assistance or social services to persons who are eligible for public assistance or social services under Subtitles II and III of this title or who may be eligible under amendments of the Social Security Act.