- International Copyright Relations of the United States (Circular 38a)
- Copyright Restoration under the URAA (Circular 38b)
Original works of expression that are eligible for copyright protection are protected under national copyright laws. Protection against unauthorized use in a particular country depends on the national laws of that country; in other words, copyright protection depends on the national laws where protection is sought. International copyright conventions and treaties have been developed to establish obligations for treaty member countries to adhere to, and implement in their national laws, thus providing more certainty and understanding about the levels of copyright protection in particular countries.