As a lecture or other work intended for oral delivery or a dramatic or musical work or a work of art, an unpublished dramatic or musical work or a work of art not reproduced in copies for sale is copyrightable without reference to date of publication, it is not altogether certain whether the term extends from the date of registration or the date of first delivery, performance or exhibition, or whether the statutory law now protects such a work under common law as unpublished, pending publication and therefore for an indefinite period if not practically in perpetuity. The Copyright Office issues a certificate for twenty-eight years, but without reference to initial date, which would be presumably the date of the certificate. The Copyright Office will doubtless, under this precedent, issue renewal certificate for the second term of twenty-eight years. {Sidenote: Publication as date of copyright} As the new copyright code makes publication with notice the basis of copyright instead of entry and deposit, as formerly, the term of copyright now dates from publication, and "the date of publication" is specifically defined (sec. 62) as "the earliest date when copies of the first authorized edition were placed on sale, sold, or publicly distributed by the proprietor of the copyright or under his authority." Such date is included in the application for registry at the Copyright Office, and on the same day twenty-eight years or fifty-six years thereafter the copyright ends. A provision for terminating copyrights at the end of the calendar year of expiration was included in the early drafts of the code, but was not included in the law as enacted. {Sidenote: Serial publication} In the case of works published and copyrighted as serials, as a novel published in parts in a monthly magazine, the copyright runs technically from the first publication of each part; and at the end of the twenty-eight or fifty-six years, each part could be successively published at monthly intervals free from copyright. Practically, however, such a copyrighted serial could not be published complete until twenty-eight or fifty-six years from the publication of the last part. In usual practice a novel is printed in book form a month or two before its completion as a serial in a magazine, and the date of the copyright on the completed work would then terminate at the end of the twenty-eight or fifty-six years from publication in book form. {Sidenote: Joint authorship}