No matter what we might wish were the case, some amendments can be further defined by law. So this isn’t a new precedent by any stretch.

Amendment III comes right out and says law can define the details.

No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law.

So does XIII, section 2

Section 2. Congress shall have power to enforce this article by appropriate legislation.

And XV, section 2

Section 2. The Congress shall have the power to enforce this article by appropriate legislation.

And, most apropos, XIV Section 5.

Section 5. The Congress shall have the power to enforce, by appropriate legislation, the provisions of this article.

So there it is right there.

Of course constitutional law is complicated. I don’t know what I don’t know. There are other solid arguments for and against, no doubt. But “unprecedented” isn’t one of them, it seems.