What are objective moral values? Do they allow for the Law of Moses or New Covenant Law?
For something to be considered moral must it be a part of God's Law?
Oh, a fun topic. Let us start with the basics. First off, what is morality? Morality is a doctrine/system of morals (dictionary.com) that serve to guide our actions towards some goal(s). There are, of course, many competing philosophies concerning morality, and they tend to conflict concerning core priorities, values, and beliefs.
To study morality objectively, however, we must consider what - objectively - should such a system's purpose be. Is there, in fact, any objective need to establish within society a moral philosophy to begin with? Or are we unnecessarily over complicating things?
Let us note that without laws (and a country's laws are effectively a form of morality), all manner of destructive deeds take place. Stealing, theft, murder, pollution, bribery, black-mail, racism, etc, etc. These things still can and do happen even with laws/moral system in place, but without anything to restrain people or to teach them differently - these things would go on uninhibited. Society would then necessarily break down into war and chaos.
Man is a social animal whose survival and well-being is dependent upon society. But in order to have a stable, healthy society where man can thrive, those within a society need to be able to trust one another and expect a certain level of respect. For instance: if you had stuff you valued, but couldn't trust leaving your house for fear everything would get stolen, would you want to remain in such a society? If you couldn't be confident that some passing stranger wasn't going to murder, rob, or rape you as you passed by - would you want to remain in such a society? Of course not. You no longer have a society at this point - but a bunch of individuals who are threatened by everyone they come across.
So it is objective to state that man requires morality - for it serves as the foundation of society. You cannot have a healthy society, the bedrock of mankind, without morality.
As for the contents of such an objective moral system, we've already laid down some guiding principles with the above observation. The purpose of an objective moral system is to bring people together, to create unity, harmony, trust, forgiveness, etc. amongst mankind so that we can thrive - individually and as a whole.
And, to tie this back to scripture, the guiding principle that optimally fulfills this role is none other than love.
Romans 13:8 Let no debt remain outstanding, except the continuing debt to love one another, for whoever loves others has fulfilled the law.