Within one year after the date appropriations are made under subsection (b) of this section for purposes of research and demonstration projects under subsection (a) of this section, the Secretary shall prepare and transmit to the Congress a study concerning the impact of vocational rehabilitation services provided under the Rehabilitation Act of 1973 [
29 U.S.C.
701 et seq.] on recipients of disability payments under titles II and XVI of the Social Security Act [
42 U.S.C.
401 et seq.,
1381 et seq.]. The study shall examine the relationship between the vocational rehabilitation services provided under the Rehabilitation Act of 1973 and the programs under sections 222 and 1615 of the Social Security Act [
42 U.S.C.
422,
1382d], and shall include—