Subject to sections
104
(e) and
105
(g) of this title [sections
1989b–3
(e) and
1989b–4
(g) of this Appendix] and except as provided in subsection (b), beginning on October 1, 1990, the payments to be made to any eligible individual under the provisions of this title [sections
1989b to
1989b–9 of this Appendix] shall be an entitlement.