In practice if an "official" client has a different interpretation of the spec it must be accepted by other clients. Like with mentioned OpenEthereum (ex. Pari

In practice if an "official" client has a different interpretation of the spec it must be accepted by other clients. Like with mentioned OpenEthereum (ex. Parity) here: https://github.com/openethereum/openethereum/blob/582bca385fedb1af682e989e5bcc6b3b2cf53028/crates/ethcore/types/src/transaction/transaction.rs#L1091 https://github.com/openethereum/openethereum/blob/582bca385f...