(1) Where a security interest in a document of title is effective against a third party, the security interest that extends to the goods covered by the document of title under section 16 is effective against a third party.
(2) During the period when a document of title covers goods, a security interest in the goods may be made effective against a third party by the possession of the document of title by the secured creditor covering the goods.
(3) In a case referred to under subsection (2), the security interest remains effective against a third party for 20 days after the document of title or the goods covered by the document of title is returned to the grantor or other person for the purpose of dealing with the goods.