Code Lists and Enumerations
Article 6
1. Code lists shall be of one of the following types, as specified in Annex II: (a) code lists that are managed in a common code list register and that shall not be extended by Member States; (b) code lists that may be extended by Member States. 2. Where a Member State extends a code list, the allowed values of the extended code lists shall be made available in a register. 3. Attributes or association roles of spatial object types or data types that have a code list type may only take values that are valid according to the register in which the code list is managed. 4. Attributes or association roles of spatial object types or data types that have an enumeration type may only take values from the lists specified for the enumeration type.