Are copyright notices required on materials on Government web sites?
It is good practice to provide notice whenever possible, even though it is not required. In addition, there may be disclaimers and use notices that apply to use of the material. Check your Agency policy regarding Web site notices. For further discussion, see the CENDI Whitepaper, Don’t Keep the Public Guessing: Best Practices in Notice of Copyright and Terms & Conditions of Use for Government Website Content (CENDI/04-4). Also see examples listed in Section 6.0.