“Notwithstanding the provisions of sections 305 and 345 of the Social Security Amendments of 1956, as amended [set out as notes below], the amendments made by sections 501, 502, 503, 504, 505, and 506 [amending this section and sections 603, 1203, 1301, and 1353 of this title] shall be effective—“(1) in the case of money payments, under a State plan approved under title I, IV, X, or XIV of the Social Security Act [42 U.S.C. 301 et seq., 601 et seq., 1201 et seq., 1351 et seq.], for months after September 1958, and
“(2) in the case of assistance in the form of medical or any other type of remedial care, under such a plan, with respect to expenditures made after September 1958.
The amendment made by section 506 [amending section 1301 of this title] shall also become effective, for purposes of title V of the Social Security Act [42 U.S.C. 701 et seq.], for fiscal years ending after June 30, 1959. The amendments made by section 507 [amending section 1308 of this title] shall be effective for fiscal years ending after June 30, 1958. The amendment made by section 508 [amending section 1304 of this title] shall be effective for fiscal years ending after June 30, 1959. The amendment made by section 510 shall become effective October 1, 1958.”