For efficiency, and to save having to add the contract to the notice later, the contract can be published at the same time as the contract details notice.
Er mwyn sicrhau effeithlonrwydd ac osgoi gorfod ychwanegu'r contract at yr hysbysiad yn ddiweddarach, gellir cyhoeddi'r contract ar yr un pryd â'r hysbysiad manylion contract.