ERC-20 has no concept of identity-checked transfers. ERC-721 and ERC-1155 give you per-token semantics but no native compliance layer. ERC-3643 (T-REX) is the industry standard for permissioned security tokens: mandatory Identity Registry checks and a configurable Compliance module evaluated on every transfer.
Each asset is its own ERC-3643 contract instance — cloned via EIP-1167 minimal proxy by the platform’s token factory. That gives per-asset supply, per-asset state machine, per- asset compliance rules, and per-asset maturity. Fractional ownership is the ERC-20 base; the Enclave-approval enforcement rides on the ERC-3643 transfer-check hook.
ENCLAVES’ guarantees are designed to survive contact with real markets, real custodians, and real legal systems. ERC-3643 is the standard those systems already speak.