What requirement is essential when dealing with antiquities from a foreign country?

When dealing with antiquities from a foreign country, the essential requirement is registration according to local laws. Many countries have specific laws aimed at protecting their cultural heritage, which often includes a requirement for the registration of antiquities. This registration process is vital to establishing legal ownership and ensuring that the items have been obtained lawfully. Compliance with local laws not only preserves the cultural integrity of the works but also protects collectors and dealers from legal disputes and potential claims regarding provenance.

In contrast, proof of artistic value, while important for evaluating the significance of an item, does not address the legal requirements surrounding ownership and transfer of antiquities. Proof of recent lineage ownership is relevant but may not be sufficient on its own if it does not comply with the registration requirements set forth by the country of origin. The choice that suggests no requirements exist is inaccurate, as international laws and conventions often impose obligations to prevent the illicit trade of cultural property.