"We are justified in considering the Christian to be free from the commandments of the Mosaic law insofar as they are part of that system, and perhaps in the sense that whatever commandments are applicable to us come with a new empowering through the 'indicative' of God's grace in Christ. But we cannot conclude from this verse that the believer has no obligation to any of the individual commandments of that law - insofar, we may say, as they may be isolated from the 'system.' Still less does this verse allow the conclusion that Christians are no longer subject to 'law' or 'commandments' at all - for nomos here means Mosaic law, not 'law' as such." (390)
----from his Romans (NICNT).