Actually, those who are in Christ, they are no longer under the law (Romans 6:14) are dead to the law (Romans 7:4, Galatians 2:19) and are delivered from the law (Romans 7:4) as concerning condemnation.
And therefore, as concerning condemnation, it is as if there is no law, and as if there is no transgression, and as if there is no sin.
Because we are forgiven of past, present, and future sins when we place our faith in Jesus.
Nevertheless, when a man comes to Christ, the love of the Lord is shed abroad in his heart (Romans 5:5); which love is the fulfilling of the law (Romans 13:8-10, 1 John 5:3, 2 John 1:6; Romans 8:4).
So, as concerning obedience, believers are under the law to Christ (1 Corinthians 9:21)...
The law is written on their hearts and minds under the New Covenant (Hebrews 8:8-10, Hebrews 10:16, Romans 8:7, Romans 8:4, 1 John 5:3, 2 John 1:6, Romans 13:8-10; Romans 5:5; 1 John 2:3-6).
So, believers in Christ, because of the love of the Lord shed abroad in their hearts (Romans 5:5) will be obedient to the law and will not sin.
However, if they should mess up, they do not lose their unshakable identity that they are righteous in Christ (Romans 4:5); being forgiven of past, present, and future sins.