Coverage of groups to which applicable
An agreement entered into with any State pursuant to subsection (a) may be applicable to either of the following coverage groups:
(1)#
individuals receiving money payments under the plan of such State approved under subchapter I or subchapter XVI; or
(2)#
individuals receiving money payments under all of the plans of such State approved under subchapters I, X, XIV, and XVI, and part A of subchapter IV.
Except as provided in subsection (g), there shall be excluded from any coverage group any individual who is entitled to monthly insurance benefits under subchapter II or who is entitled to receive an annuity under the Railroad Retirement Act of 1974 [ 45 U.S.C. 231 et seq.]. Effective January 1, 1974 , and subject to section 1396a(f) of this title , the Secretary shall, at the request of any State not eligible to participate in the State plan program established under subchapter XVI, continue in effect the agreement entered into under this section with such State subject to such modifications as the Secretary may by regulations provide to take account of the termination of any plans of such State approved under subchapters I, X, XIV, and XVI and the establishment of the supplemental security income program under subchapter XVI.