Key to the re-numbering of Articles, Notes, and Recommendations
The Nomenclature Section in Melbourne instructed the Editorial Committee to re-organize the rules on valid publication of names (Art. 32–45) in a more logical manner. As a result the Articles, Notes, and Recommendations in what is now Chapter V have been substantially re-arranged. This key includes all these changes and also those in other parts of the Code. Examples are omitted as these can readily be traced via the Indices, through the plant names mentioned.
2. Melbourne Code to Vienna Code
| Pre. 2 | new |
| Pre. 3–8 | Pre. 2–7 |
| Pre. 9–10 | new |
| Pre. 11–14 | Pre. 8–11 |
| Art. 6.9–6.11 | new |
| Art. 6 Note 3–4 | new |
| Art. 7.3 | Art. 7.4 |
| Art. 7.4 | Art. 7.3 |
| Art. 7.7–7.8 | Art. 7.7 |
| Art. 7.9–7.10 | Art. 7.10–7.11 |
| Art. 7 Note 1 | Art. 7.9 |
| Rec. 8B.3 | new |
| Art. 9.3 | Art. 9 Note 2 |
| Art. 9.4–9.9 | Art. 9.3–9.8 |
| Art. 9.10 | Art. 7.8 |
| Art. 9.11–9.23 | Art. 9.9–9.21 |
| Art. 9 Note 2–4 | new |
| Art. 9 Note 5–7 | Art. 9 Note 3–5 |
| Rec. 9A.4 | Rec. 9A.5 |
| Rec. 9C.1 | new |
| Rec. 9D.1 | new |
| Art. 11 Note 1 | Art. 11 Note 4 sent. 1 |
| Art. 11 Note 2–4 | Art. 11 Note 1–3 |
| Art. 11 Note 5 | Art. 11 Note 4 sent. 2 |
| Art. 13 Note 1 | Art. 13.5 |
| Art. 14.13 | new |
| Art. 14.14 | Art. 14.13 |
| Art. 14.15 | new |
| Art. 14.16 | Art. 14.14 |
| Art. 16.3 (in part) | Rec. 16A.1–3 |
| Rec. 16A.1 | Rec. 16B.1 |
| Art. 18 Note 1–2 | new |
| Art. 18 Note 3 | Art. 18 Note 1 |
| Art. 19.5 | new |
| Art. 19.6–19.8 | Art. 19.5–19.7 |
| Art. 22 Note 2 | Art. 22.7 |
| Art. 29.2–29.3 | new |
| Art. 29 Note 1 | new |
| Rec. 29A.1–2 | new |
| Art. 30.1 | Art. 29.1 sent. 2 |
| Art. 30.2–30.3 | new |
| Art. 30.4–30.8 | Art. 30.1–30.5 |
| Art. 30 Note 1–2 | new |
| Art. 30 Note 3–4 | Art. 30 Note 1–2 |
| Rec. 30A.1 | new |
| Rec. 30A.2–4 | Rec. 30A.1–3 |
| Art. 31.2 | new |
| Art. 31.3 | Art. 31.2 |
| Rec. 31B.1 | Rec. 45B.1 |
| Rec. 31C.1 | Rec. 45C.1 |
| Art. 32.1 | Art. 32.1(a–c) |
| Art. 32.2–32.3 | Art. 32.7–32.8 |
| Art. 32.4 | Art. 40.1 |
| Art. 32 Note 1 | new |
| Art. 32 Note 2 | Art. 40 Note 1 |
| Art. 32 Note 3 | Art. 32 Note 1 |
| Rec. 32A.1 | Rec. 45A.1 |
| Art. 33.1–33.2 | Art. 45.1–45.2 |
| Art. 34.1–34.2 | Art. 32.9–32.10 |
| Rec. 34A.1 | Rec. 32F.1 |
| Art. 35.1 | Art. 43.1 |
| Art. 35.2 | Art. 33.1 |
| Art. 35 Note 1 | Art. 43 Note 1 |
| Art. 36.1–36.2 | Art. 34.1–34.2 |
| Art. 37.1–37.5 | Art. 35.1–35.5 |
| Art. 37.6–37.9 | Art. 33.9–33.12 |
| Art. 37 Note 1 | Art. 33 Note 3 |
| Art. 38.1 | Art. 32.1(d–e) |
| Art. 38.2–38.4 | Art. 32.2–32.4 |
| Art. 38.5–38.6 | Art. 42.1–42.2 |
| Art. 38.7 | Art. 41 Note 2, Art. 42.3 |
| Art. 38.8 | Art. 44.1 |
| Art. 38.9 | Art. 42.4 |
| Art. 38.10 | Art. 44.2 |
| Art. 38.11 | Art. 41.1–41.3(a–b) |
| Art. 38.12 | Art. 41.3(c) |
| Art. 38.13–38.14 | Art. 32.5–32.6 |
| Art. 38 Note 1 | Art. 41 Note 1 |
| Rec. 38A.1 | Rec. 32A.1 |
| Rec. 38B.1 | Rec. 32B.1 |
| Rec. 38C.1 | Rec. 32C.1 |
| Rec. 38D.1–3 | Rec. 32D.1–3 |
| Rec. 38E.1 | Rec. 32E.1 |
| Art. 39.1 | Art. 36.1 |
| Art. 39.2 | new |
| Rec. 39A.1 | Rec. 36A.1 |
| Art. 40.1–40.7 | Art. 37.1–37.7 |
| Art. 40 Note 1–4 | Art. 37 Note 1–4 |
| Rec. 40A.1 | Rec. 37A.1 |
| Rec. 40A.2–4 | new |
| Art. 41.1 | new (from Art. 33 and 41) |
| Art. 41.2 | new (from Art. 41) |
| Art. 41.3–41.8 | Art. 33.2–33.7 |
| Art. 41 Note 1 | Art. 33 Note 1 |
| Art. 41 Note 2 | new |
| Art. 41 Note 3 | Art. 33 Note 2 |
| Rec. 41A.1 | Rec. 33A.1 |
| Art. 42.1–42.3 | new |
| Art. 42 Note 1 | new |
| Rec. 42A.1–2 | new |
| Art. 43.1 | Art. 36.3 |
| Art. 43.2 | Art. 38.1 (amended) |
| Art. 43.3 | Art. 38.2 |
| Art. 43 Note 1 | new |
| Art. 44.1 | Art. 36.2 |
| Art. 44.2 | Art. 39.1 |
| Art. 44 Note 1 | new |
| Rec. 44A.1 | Rec. 39A.1 |
| Art. 45.1 | Art. 45.4 sent. 2–3 |
| Art. 45 Note 1 | new |
| Art. 45 Note 2 | Art. 45.4 sent. 1 |
| Art. 46.4 | Art. 46 Note 2 |
| Art. 46.5–46.8 | Art. 46.4–46.7 |
| Art. 46.9–46.10 | Art. 46 Note 3–4 |
| Art. 46 Note 2–3 | new |
| Art. 48.2–48.3 | new |
| Rec. 50G.1 | Rec. 34A.1 |
| Art. 53 Note 1 | Art. 45.3 |
| Art. 56.3–56.4 | new |
| Rec. 56A.1 | new |
| Art. 57.2 | new |
| Art. 59.1 | replacement |
| Art. 59 Note 1 | replacement |
| Art. 59 Note 2 | new |
| Art. 59 Note 3 | Art. 34 Note 1 |
| Art. 60.11 | new |
| Art. 60.12–60.13 | Art. 60.11–60.12 |
| Rec. 60G.1(b) | Rec. 60G.1(a)(3), Rec. 60G Note 1 |
| Rec. 60G.1(c) | Rec. 60G.1(b) sent. 1–4 |
| Rec. 60G Note 1 | Rec. 60G.1(b) last sent. |
| Art. 62 Note 2 | new |
| Art. H.10.2 | Art. H.10.3 |
| Art. H.10 Note 1 | Art. H.10.2 |
| Art. H.10 Note 2 | Art. H.10 Note 1 |