The act provides (sec. 53): "That, subject to the approval of the Librarian of Congress, the Register of Copyrights shall be authorized to make rules and regulations for the registration of claims to copyright as provided by this Act," and (sec. 54) "whenever deposit has been made in the Copyright Office of a copy of any work under the provisions of this Act, he shall make entry thereof." {Sidenote: Application} It is provided (sec. 5): "That the application for registration shall specify to which of the [stated] classes the work in which copyright is claimed belongs," but it is also provided "nor shall any error in classification invalidate or impair the copyright protection." In Green _v._ Luby, in 1909, the U. S. Circuit Court protected a vaudeville sketch, though classified as a dramatic instead of a dramatico-musical copyright, against infringement by a mimic performance. {Sidenote: Certificate} It is further provided (sec. 55): "That in the case of each entry the person recorded as the claimant of the copyright shall be entitled to a certificate of registration under seal of the Copyright Office, to contain his name and address, the title of the work upon which copyright is claimed, the date of the deposit of the copies of such work, and such marks as to class designation and entry number as shall fully identify the entry. In the case of a book the certificate shall also state the receipt of the affidavit as provided by section sixteen of this Act, the date of the completion of the printing, or the date of the publication of the book, as stated in the said affidavit. The Register of Copyrights shall prepare a printed form for the said certificate, to be filled out in each case as above provided for, which certificate, sealed with the seal of the Copyright Office, shall, upon payment of the prescribed fee, be given to any person making application for the same, and the said certificate shall be admitted in any court as _prima facie_ evidence of the facts stated therein. In addition to such certificate the Register of Copyrights shall furnish, upon request, without additional fee, a receipt for the copies of the work deposited to complete the registration." {Sidenote: Application requirements}