This section wraps up (for the most part) the rules in the "Book of the Covenant" (see Ex. 24:3). The theme underlying much of the last few weeks has been what does today's Christian do with the law.
As per the NIV Application Commentary on Exodus, Paul seems to offer three options:
Some observations:
If you go with option 2 or 3 you're compelled to pick and choose the ones you like vs. the ones you don't.
Maybe the best way to look at these rules is to maintain the context: This tells us how God taught/led His people at this point in history.
The teachings (and principles!) in the New Testament should be a good guide and filter.
Study notes are here.