The process of validating the first published name in accordance with the rules of the International Code of Nomenclature when a taxon has more than one name is called the law of priority. If it happens, scientific name of a species is given many in the same or different countries, according to the principles or priority, the first scientist who submits the documents to the ICBN first will be accepted.
As a result of the operation of the law of precedence, naming conventions are strong and clear. Deprecated names are used as synonyms or pronouns. In this the name is recognized and accepted by everyone. The law of priority will apply.
1. If any part of the animal’s body is named before naming the whole animal.
2. Different genes of a species are called by different names for physical structure, variable state or sexual state.
3. If a living creature was named before 1931.