It is obsolete, outdated, and will disappear (Hebrews 8:13)
1. The term "the Law" can be applied to different things at different times, depending on the context. It can apply to (a) all Scripture, (b) just the Old Testament, (c) just the Old Covenant, (d) just the Torah (first five books of the Bible), or (e) just the Ten Commandments.
2. The Scripture quoted above from Hebrews applies to (1) the Levitical priesthood, (2) the whole sacrificial system of the tabernacle and the temple, (3) all the ceremonial observances including feasts and festivals, holy days, new moons, sabbaths, etc. IOW the one great sacrifice for sins for ever by Christ abolished all of these, which were types and shadows.
3. The Ten Commandments -- the moral and spiritual laws of God -- are eternal. They were written on tablets of stone in the Old Covenant, but they are written on the hearts and minds of believers in the New Covenant. They are also embedded in the Law of Christ, the Law of Love, the Law of Liberty,also called the Royal Law.
4. The Ten Commandments were distilled by Christ into the two greatest commandments (which are found in the Torah), and both these commandments boil down to just one word -- Love or Agape or Charity. So the Ten Commandments were definitely not abolished, but are embedded in the Law of Love (Rom 13).
5. Christians are not under the Old Covenant (the Law of Moses) but even so there are four commandments from the Law of Moses which still apply to all Christians. See Acts 15.
6. The grace of God is not a license to sin, but when Christian walk in the Spirit, they are in fact applying the Law of Love to their relationship with God and men.
7. The works of the Law were never meant to save anyone, but those who follow the moral and spiritual precepts of the Law of Moses are actually following the Law of Christ.
8. The moral and spiritual principles of sabbath observance (rest and worship) have been transferred to the Lord's Day. Therefore there is no mention of sabbath observance in Acts 15.