As the Royal Arms are personal to the sovereign they cannot be used without consent.[69] The coat of arms "as designed in 1921 and revised in 1957...(and) in 1994" are "protected under the Trade-marks Act and the Copyright Act and cannot be used or reproduced without authorization".[46] Further, "Marks and designs similar to the official symbols are pursued as a copyright or trade-mark infringement".[46] The Trade-marks Act further states that "No person shall adopt in connection with a business, as a trade-mark or otherwise, any mark consisting of, or so nearly resembling as to be likely to be mistaken for... the arms, crest or flag adopted and used at any time by Canada".[70] In addition, under Crown copyright, "permission is always required when the work is being revised, adapted, or translated regardless if the purpose of the reproduction is for personal or public non-commercial distribution".[71]