In the United States Congress, there are two legislative bodies: the House of Representatives and the Senate. These two bodies are structured differently from the very beginning in Article 1 of the U.S. Constitution in that the Senate represents each U.S. state equally (two senators for each state) and House represents populations roughly equally: "Representatives ... shall be apportioned among the several States which may be included within this Union, according to their respective Numbers... The actual Enumeration shall be made ... within every subsequent Term of ten Years, in such Manner as they shall by Law direct."
So big states (w.r.t. population) get more representatives than do small states. The Constitution does not spell out how many total representatives there are in the House nor exactly the manner that the apportionment shall determine how many each state gets. It's just that every 10 years, we must have a Census for which the primary Constitutional purpose is to determine how the U.S. House of Representatives is apportioned among the now 50 U.S. states. The data from the Census gets used in a variety of ways and purposes, but this is the original primary purpose of the U.S. Decennial Census. It's a big deal.
(I would presume, in the European Union, that they have the same issue, but maybe settle the issue differently.)
So then, the specific number of U.S. representatives and the specific manner of proportionately distributing their seats to the various states is a matter of federal law (one notch lower than the Constitution) and is spelled out in U.S.C. Title 2. Well, not really completely spelled out, hence this question.
Okay, I know and understand what "the method known as the method of equal proportions" is. It's also known as the Huntington-Hill Method and is referred to as "the method known as the method of equal proportions" in §2a and §2b of U.S.C. Title 2.
There is also some useful history to read but I want to see the actual document in law that spells it out. Even if it was a report transmitted to Congress circa 1941, I would like to see what a federal judge would be saying that "this is what the law is" and I cannot find that.
Where is this "method of equal proportions" actually spelled out in the actual law? I cannot find it. I understand how the H-H method works and I have read a little history about it.