Gal 5:19, Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,
Gal 5:20, Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies,
Gal 5:21, Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
Gal 5:22, But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,
Gal 5:23, Meekness, temperance: against such there is no law.
Notice that the works of the flesh are all things that if practiced would be in violation of the law.
There is no law against walking according to the fruit of the Spirit (see also Galatians 5:16-17).
Rom 3:21, But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets;
Rom 3:22, Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
Rom 3:23, For all have sinned, and come short of the glory of God;
Rom 3:24, Being justified freely by his grace through the redemption that is in Christ Jesus:
Heb 7:12, For the priesthood being changed, there is made of necessity a change also of the law.
This change of law is in that we are no longer required to obey a set of do's and don'ts; but rather we now have a relationship with Jesus Christ, even the Holy Ghost; and do obey His promptings for obedience. As born again believers in Christ, we no longer walk according to the flesh. For the element of sin has been relegated to the flesh:
Rom 8:3, For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:
Therefore, under the changing of the law, sin is no longer defined as the transgression of a set of do's and don'ts (although that definition still applies) but it is defined as walking according to the flesh.
If you walk according to the flesh, you sin (and are transgressing the law somehow, 1 John 3:4). But if you walk according to the Spirit, you do not sin.
Therefore, our focus as believers has changed...
We no longer have to pay attention to the requirement as a means of obedience to the Lord. Instead, we look to Christ Himself, trusting and relying on His Holy Spirit to live His life in us and through us (Galatians 2:20); and in this we will not be violating any true law of scripture that the Lord wants us to obey in today's world.
Now the scripture does say,
Pro 28:9, He that turneth away his ear from hearing the law, even his prayer shall be abomination.
We continue to look to the law as a means for our continuing to realize that we are sinners; for it is needful that we understand this; and those who do not think that they are sinners any longer are most often in spiritual danger.
Rom 3:20, Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.
Conclusion: as believers in Jesus Christ, our salvation is no longer based on keeping a set of do's and don'ts; but on a relationship with a Person. In placing our trust in Christ and looking to Him for guidance and to live His life in us and through us, we will be able to live the Christian life and will not be in violation of any true law of the Old or New Testaments.
I would add, that we are justified freely as sinners by the grace of the Lord Jesus Christ; and that therefore if any man sin, we have an Advocate with the Father, Jesus Christ the righteous: and we are also forgiven of past' present, and future sin(s)...Romans 4:8, Romans 8:38-39, Hebrews 9:12.
And therefore, our obedience to God is not based on fear of divine retribution, but on a love for Jesus Christ. We love Him because He first loved us (1 John 4:19); and we love much because we have been forgiven much (Luke 7:36-50). It has been shed abroad in our hearts through the Holy Ghost (Romans 5:5).
And this love, again, is the fulfilling of the law within us (Romans 13:8-10, Galatians 5:14, 1 John 5:3, 2 John 1:6, Romans 8:4)...which love is not in word or in tongue only; but in deed and in truth (1 John 3:17-18).