SCLC/Rosa #678 — 1968 tribal-consent rule is prospective; grandfathered cessions stand

GPT-6 Sol archive · Justice 1961 · PL 90-284 Title IV · finding 678

Public Law 90-284 Title IV (1968) requires tribal consent for new state assumptions of Indian-country jurisdiction, authorizes federal acceptance of retrocession, and repeals old §7 without undoing cessions already made. §406 is a majority of adults voting; 20% of enrolled adults may request an election — not approve jurisdiction.

The 1968 law is prospective reform plus a retrocession mechanism, not a blanket rollback of pre-1968 state jurisdiction.

Archive notes: desk synthesis of GPT-6 Sol finding 678 / PL 90-284 §§401–406.