A name that has been widely and persistently used for a taxon or taxa not including its type is not to be used in a sense that conflicts with current usage unless and until a proposal to deal with it under Art. 21 has been submitted and rejected.
Provisions for the conservation and suppression of names, and mechanisms for implementing them, are detailed in the Special Codes (see Div. III.9).
Conservation or suppression of names, nomenclatural acts or publications can suspend the application of the rules to names of taxa of the family group, genus group and species group. Conservation also permits the amendment of Adopted List of names (Art. 20).
Conservation and suppression (Art. 21) override protection.
Only if the corresponding genus or species name is established can the name of a subordinate taxon be established (but see Art. 30.2).