Exclusive: The rules of the KJB Translators are in an early manuscript named BL [British Library Board] MS Harley 750 (which is contained in Pages 88-89 of Manifold Greatness: the Making of the King James Bible). (The LINK requires somebody to have a WebArchive Account to view, but we at the Real King James I channel were able to make an account and screenshot "The Rules" document). The transcription of The Rules is in the below message.