God and marriage
Concerning marriage, how would you handle a situation in which a marriage is recognized in one country but not another? Would this constitute a valid marriage in the eyes of God? Could the couple engage in legitimate sexual activity? Or what if a government makes changes in the civil law, so that a previously recognized marriage is declared not valid?
There may be a specific situation behind your questions, but I am not aware of it. Because of that, I can offer only a general response.
The Bible defines marriage as the union between a man and a woman (Genesis 2:24; Matthew 19:4-6). Governments might define marriage differently and regulate it with laws, but marriage in God’s eyes follows the directives of his word.
“Legitimate sexual activity” is that which takes place in marriage—as God, in the Bible, defines marriage.