Render unto Cesar that which is Cesar's and unto God that which is God's
This one verse is all you need. The official interpretation is that you must submit to man's authority on earthly subjects and you must submit to God's will in all other matters.
The subject of preserving the sanctity of your body as a temple to the Lord is a spiritual matter and therefor it is God's law that must be submitted to even if this means defying the laws of men.
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