The main purpose of this legislation is to establish a Congressional time capsule to celebrate the 250th anniversary of the United States, known as the semiquincentennial. The act aims to create a historical artifact that will capture significant aspects of American culture and governance at this milestone. Key provisions of the act include the responsibility of the Architect of the Capitol to create the time capsule, which will be sealed and buried on the West Lawn of the Capitol by July 4, 2026.