Ethereum core developers have formally proposed EIP-7732, which is the formal specification of Enshrined Proposer-Builder Separation (ePBS).
EIP-7732 is a consensus-only upgrade that separates execution validation from consensus validation, embedding PBS directly into Ethereum's consensus layer. PBS refers to the separation of block proposers and builders.
EIP-7732 includes modifications to the beacon chain, fork selection rules, P2P communication, and allows validators to play the role of builders. ePBS provides trustless exchange between proposers and builders and enables validators to use CPU efficiently. This implementation features a Payload Timeliness Committee (PTC), where a subset of the validation committee votes on the timeliness of builder payload releases.