It's a critical law currently working its way through congress. It's not only indecipherable, but far longer than the entire original US Constitution. And that's a trend - when things were done by people and for people, they tended to be brief and clear. As lawyers got involved, everything became a convoluted indecipherable mess which may as well be written in Latin.
I took a look at a few random sections of it and didn't see anything undecipherable, other than maybe things that lack enough context because it is written as a diff from the current law.
The comparison to the length of the Constitution makes little sense to me. The Constitution establishes a framework and some power allocations. It says almost nothing about the bazillion lower level details necessary to actual have a functioning county.
Obviously individual sections of a law are going to literally 'decipherable' in the sense that they are written in English, but try to tell me what that bill "really" does, the incentive for its passing, the implications, and so forth. Almost nobody would be able to do that. By contrast read the Constitution and anybody could easily understand the structure of the United States government. Or similarly the Bill of Rights lays out some of the most critical rights and restrictions in the US, yet each is no longer than a few sentences which are easily understood.
OK, but now in addition to understanding the structure of US government from reading the Constitution try to understand those things you ask of the bill: the incentive for passing the Constitution, its implications, and so forth.
At the least you also need to read the Federalist Papers, the Anti-Federalist papers, many early debates in Congress over what the heck the Constitution means, many early Supreme Court cases, and probably a fair bit of history to understand the issues the country had under the Articles of Confederation that the Constitution was supposed to address.
Same for the Bill of Rights.
In modern terms things like the Constitution and the Bill of Rights are prompts. Bills and case law are implementations.
The implementations are complicated because (1) law concerns people and what they do and people and their endeavors are complicated, (2) we have a whole lot of people in a large interconnected and interdependent economy, and (3) a whole lot of people look for any ambiguity they can find and try to exploit it for their own gain, often to great detriment to others, so bills need to be explicit to cover the edge cases.
Similarly when I speak of the motivation for things, I'm not speaking of some subtle and nuanced historical understanding of motivation, but simply what something does and why somebody might want it. If somebody is of average intelligence they can easily infer such from the Constitution, Bill of Rights, and so forth. But in that bill I referenced, you can't even ELI5 the law, let alone why or what it would change. It's an obfuscated mess. And none of this is necessary at all.