EU on Illicit Cultural Property

When should the import of a cultural good be considered illicit?  EU Proposal

The import of cultural goods into the EU can be considered illicit when those goods have been exported from a non-EU country illegally, i.e. it is the laws of the exporting country which determine the licit or illicit character of the goods in question. These laws can range from national legislative measures for the protection of cultural goods, or implementation of the UNESCO Convention.