The International Code of Nomenclature for algae, fungi, and plants or Madrid Code (hereafter “Code”) was published on 25 July 2025 in print, eBook, and PDF editions (Turland Prov. 3 concerns institutional votes (see below); and Prov. 4 and 5 concern the Nomenclature Section, including its functions, procedure, voting, and the election and appointment of the Rapporteurs and other officers of the Bureau of Nomenclature. The list of institutional votes for the Madrid Congress was published prior to that Congress (Ulloa Ulloa see also 12 below. 5. Proposals to amend the Code at the Cape Town Congress in 2029 must be based on the text of the Madrid Code. 6. Manuscripts must conform to the general standards of Taxon (see “Author Guidelines” at https://onlinelibrary.wiley.com/page/journal/19968175/homepage/author-guidelines), except that the method of citing references follows that of the special “Guidelines for proposals to conserve or reject names” (Wiersema “Delete Art. 46.10”; “Amend Rec. 23A.3 to read as follows (new text in bold, deleted text in strikethrough)”. Proposals must not consist simply of new text or explanation but must indicate precisely what text is to be inserted, deleted, or changed in the Code. This can be achieved by copying and pasting the text from the online edition of the Code and then showing new text in bold and deleted text in strikethrough. 15. When a proposal affects more than one provision of the Code, it should not be divided into separately numbered proposals for each provision affected, but rather grouped into as few numbered proposals as possible. Reordering and renumbering of provisions need not be mentioned because this will be done by the Editorial Committee should a proposal be accepted. 16. Authors will be asked to revise or withdraw proposals that conflict with other parts of the Code or that would cause significant nomenclatural disruption. 17. Proposals to insert, delete, or change Examples (excluding voted Examples; see Art. 7 *Ex. 17 footnote) or Glossary entries will not be accepted for publication in Taxon unless they accompany a proposal to amend an Article, Note, or Recommendation and are important for the understanding of that proposal (because the Editorial Committee can insert, delete, or change Examples and Glossary entries without a proposal; Div. III Prov. 7.12). Instead, they may be submitted directly (email protected) to the Editorial Committee, which, prior to the Cape Town Congress, is represented by the Rapporteurs. Proposals that concern only Examples or Glossary entries must follow the rules of 18. 18. If Examples are included, they must follow the format used in the Madrid Code, i.e. with places of publication cited in full. Authors must provide links to online versions of those publications and the protologues of any basionyms, replaced synonyms, or names causing illegitimacy. Online resources include the Biodiversity Heritage Library (https://www.biodiversitylibrary.org/), Biblioteca digital del Real Jardín Botánico CSIC (https://bibdigital.rjb.csic.es/), Gallica (https://gallica.bnf.fr/), Google Books (https://books.google.com/), HathiTrust (https://www.hathitrust.org/), and similar collections. For publications that are not yet online, a scanned copy of the relevant pages (including the title pages) is requested. 1. In general, proposals that contribute to nomenclatural stability are more likely to be successful. 2. Proposals that reduce the complexity of the Code without negatively affecting nomenclatural stability are also likely to succeed. 3. Proposals that address nomenclatural situations that occur only rarely are unlikely to succeed, especially if they add to the complexity of the Code. 4. Authors who feel an urge to write very many proposals to amend the Code should bear in mind the substantial cost in time to the Rapporteurs, the persons participating in the guiding vote, and the members of the Nomenclature Section, all of whom are performing their duties voluntarily. It is therefore recommended that an individual or team does not author more than 50 proposals. The Rapporteurs may decide to reject proposals that disregard this recommendation. 5. Authors are encouraged to provide a list of all the provisions of the Code (Articles, Notes, Recommendations, Examples, etc.) believed to be affected by a given proposal. This helps the Editorial Committee, whose main job is to ensure that any amendments adopted for the new Code are fully integrated with the existing text and consistently implemented throughout. 6. Use of the template Word document (Appendix S1) provided in the supporting information is strongly recommended. Appendix S1: Template Word document for proposals to amend the International Code of Nomenclature for algae, fungi, and plants. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
Turland et al. (Sun,) studied this question.
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