The bill mandates the creation of a Congressional time capsule, to be buried on the West Lawn of the Capitol, containing materials related to the United States Semiquincentennial. Its contents, determined by congressional leadership, include books, legislative milestones, a message to future Congresses, and other relevant items. The Speaker of the House will seal the time capsule until its unsealing on July 4th, 2276, by the 244th Congress, which will decide how to handle its contents. The Architect of the Capitol is responsible for its creation. The time capsule's purpose is to preserve historical materials for future generations and commemorate the Semiquincentennial.