Sovereign Custodial Leasehold–Coupled Official Development Assistance Flywheel Architecture with Native-Title-Preserving 99-Year Lease (extendable under a 99 + 99 + 99 Conditional Renewal Doctrine), Upfront-Fee-as-Future-Sovereign-Debt-Write-Down Mechanism, Third-Party ODA Channel On-Licence Gate, Joint-Venture ECF Retort Flywheel Coupling, Carbon × Cull Perpetuity Coupling and Sustainable Channel Facility, Climate-Bond Wrapper Coupling across the GSS+ Use-of-Proceeds and Sustainability-Linked Bond Family with Supranational Issuer Pathway and Debt-for-Nature Swap Conversion Rail.