(a) Except as modified by and pursuant to the provisions of this article the same provisions concerning eligibility for assistance as obtain with respect to old-age assistance, aid to the blind, temporary assistance for needy families, and aid to the totally and permanently disabled shall remain in force and effect.

(b) The department is authorized to enter into agreements with departments and agencies of the government of the United States for the purposes of accepting grants, providing matching funds, and administering of such grants and funds, in accordance with regulations to be promulgated, for research and demonstration projects under Title XI, Section 1115, of the federal Social Security Act, without regard to the factor of state wideness and such other factors as may be required to be waived by the terms of the federal grant. The department also shall be authorized to participate in work experience or any other projects authorized under Title V of the Economic Opportunity Act of 1964, P.L. 88-452, 78 Stat. 508, and in the distribution of surplus food through a food stamp program under 7 U.S.C., Section 2013.