Answer:
International Code of Botanical Nomenclature Principles: 
1- Independence 
2- Classification based on the type 
3- Priority 
4- Uniqueness 
5- Latin use 
6- Retroactivity 
 
Explanation: 
The six principles of the International Code of Botanical Nomenclature (ICBN) are as follow: 
1- Independence principle: botanical nomenclature is independent of other nomenclatures. This means that all plants must be classified in accordance with the ICBN rules, without exception. 
2- Classification based on the type: classification is based on nomenclatural types (selected types are referred to as syntypes). 
3- Priority principle: the priority for the nomenclature of a particular taxonomic group is determined by its publication. 
4- Uniqueness principle: there exists only one specific name for each taxonomic group. 
5- Latin use: scientific names must be Latinized or treated as if they were in Latin. 
6- Retroactive rule: it is imperative to consider the consequences of proposed changes in names already published.