I · WHITE PAPER No. 18 of XXI ELITE EDITION BEYOND RBAC Attribute-Driven Authorisation for Cloud-Scale Financial Data Systems - A Doctrine for Dynamic Entitlement at Petabyte Scale A Doctrine-Grade White Paper for Tier-1 Financial, Regulated, and Sovereign Institutions - Aligned to NIST AI RMF · ISO/IEC 42001 · EU AI…