According to the rules in the current Code (Turland & al. in Regnum Veg. 159. 2018), a final decision regarding a request for a binding decision (i.e. "whether a descriptive statement satisfies the requirement of Art. 38.1(a) for a 'description or diagnosis'",Art. 38.4, or "whether names or their epithets are sufficiently alike to be confused", Art. 53.4) is taken by an International Botanical Congress (IBC), with retroactive effect, and listed in the Appendices VI and VII of the Code, respectively.