When the property to be delivered to the Treasurer pursuant to the provisions of section 3-65a is an ownership interest in a business association presumed abandoned under section 3-59b, the holder shall deliver a duplicate certificate of such interest, registered in the name of the Treasurer, to the Treasurer if such a certificate is the customary evidence of such interest and, if the ownership interest is not customarily evidenced by a certificate, the holder shall deliver such evidence of such ownership interest as the Treasurer may by regulation require.