1. Short title; findings (a) Short title This Act may be cited as the Census Improving Data and Enhanced Accuracy Act or the Census IDEA Act . (b) Findings Congress finds the following: (1) The decennial census was embedded in article I of the Constitution of the United States by the founders of the United States. (2) The decennial census measures the progress of the country and helps chart our future. (3) The decennial census, for the decade to follow, shapes the reapportionment of the House of Representatives and the drawing of hundreds of congressional political districts and thousands of State and local political districts. (4) More than $800,000,000,000 in Federal assistance to States and local communities every year is informed by the results of the decennial census. (5) The decennial census is the largest peacetime mobilization undertaken by the Federal Government. (6) Congress must ensure that every decennial census is a complete, accurate, and fair decennial enumeration of all individuals in the United States. (7) Any late, untested changes to the operational design of the decennial census will jeopardize public cooperation with the census and, therefore, the success and accuracy of the census. 2. Limitations and requirements for the decennial census Section 141 of title 13, United States Code, is amended— (1) in subsection (f)— (A) in paragraph (1), by adding and at the end; (B) in paragraph (2), by striking ; and and inserting a period; and (C) by striking paragraph (3); (2) by redesignating subsection (g) as subsection (h); (3) by inserting after subsection (f) the following: (g) Limitations and requirements (1) Notice to Congress of operational design, subjects, types of information, and questions In the 2020 decennial census of population and each decennial census thereafter, the Secretary may not— (A) with respect to the census, implement any major operational design element that has not been researched, studied, and tested for a period of not less than 3 years before the decennial census date