The law of the Spirit is the same as the law of Christ. The law of the Spirit is the Torah being placed into our hearts, Jesus being our ministering High Priest in real time, atoning for our sins when we fall short and sin when we acknowledge our transgressions and crooked ways.
The whole Bible (the book of law) is the law of the Spirit .It as a whole contains no philosophical theories of men. Every law is an eye witness account of one who was their moving men according to the good purpose of his revealed will.
In the beginning God created. It is the first law. Do not add or subtract from the prophecy of this book, the last. Trying to divide it in to different sections as if some laws had a higher degree and others lower is where I believe some error. it would be like saying the good new(gospel is only found in chapters .When it begins in the beginning . And on the 7th day God rested as the Sabaath rest we do enter into according to the lamb of God slain from that foundation.
If we would offend any part of the Bible, the book of the law , to include the gospel which as a law commands us to believe upon the Lord as he gives us the His faith to make it possible we will be found guilty of the whole.
James 2:10 For whosoever shall keep the "whole law", and yet offend in one point, he is guilty of all.