This (from a quick reading, I might have misunderstood) seems to be a system for categorising laws, but not exactly what I was talking about: when you look for something, you're still referring to individual laws, by law number or popular name.

Instead, when you want to read a computer program, you don't look at individual commits to the code base, you look at its files. Commits are more or less irrelevant, what counts is the most recent version of a set of documents, and each commit might create, modify or delete more than one document.

It seems only a change in perspective, the end result is the same; but reasoning in terms of documents with well-organised names and responsibilities, describing processes and data and designed for reusability, is much easier and more compact.

Here's a better link, to the text of the United States Code:

https://uscode.house.gov/

It's still full of references to bills and such, but it is the consolidated text of the law.

This is one aspect of how LexisNexis and Westlaw make their money. Copies of legal instruments in their up-to-date 'as amended' form are often behind a paywall.