The Department of the Interior issues guidance on which services continue and which are suspended during a shutdown. Members of Congress continue to receive their salaries, as their pay can only be changed by law. Mail delivery is unaffected because the US Postal Service is self-funded.
Some offices, such as the Patent and Trademark Office, may stay open for a limited period by using operating reserves. In some cases, the Washington, DC municipal government also remains open. The Congressional Budget Office continues to function to support Congress in carrying out its constitutional duties.



































