Directly? No ! but as this is an operating command for believers:
Romans 13
King James Version
13 Let every soul be subject unto the higher powers. For there is no power but of God: the powers that be are ordained of God.
2 Whosoever therefore resisteth the power, resisteth the ordinance of God: and they that resist shall receive to themselves damnation.
3 For rulers are not a terror to good works, but to the evil. Wilt thou then not be afraid of the power? do that which is good, and thou shalt have praise of the same:
4 For he is the minister of God to thee for good. But if thou do that which is evil, be afraid; for he beareth not the sword in vain: for he is the minister of God, a revenger to execute wrath upon him that doeth evil.
5 Wherefore ye must needs be subject, not only for wrath, but also for conscience sake.
6 For for this cause pay ye tribute also: for they are God's ministers, attending continually upon this very thing.
7 Render therefore to all their dues: tribute to whom tribute is due; custom to whom custom; fear to whom fear; honour to whom honour.
So in countries that require some ceremony to authorize a marriage- we should have a ceremony.
I do not know if there is any country that does not require some legal recognition of intent and then actual marriage.
I do know however thast in Ghana as late as the 1980's if one wished to divorce his wife, all he needed to do was go to the town square and publicly declare 3 times he divorces his wife and the divorce was considered legal. But that is a different issue.
I can give you teh reasons why believing churches require a ceremony. It is a public declaration of the couples intent to be faithful to each other and also to allow anyone who has reasons why the couple should not wed to come forward.
But within God speople there has always been some form of ceremony. Whether the complex marriages of today with all the glitz and glamour or the simple things of a father picking a wife for their son and publicly handing her over to him, or the agreement of two fathers with a handshake and the paying of a bride price, there has always been some form of legal recognition of the couple becoming wed.
Even the commandment of not commiting adultery recognizes that a woman is a mans wife. So having sex with a woman is in reality having sex with somes wife. Even if both are not married, for the standard of God is 1 man for 1 woman for life!
But let us assume that just having intercourse with a woman is enough to be considered wed. That would still rule out multiple sex partners! For as soon as you have intercourse with a weoman she is your wife and other than the 3 biblical allowances for remarriage, if one has another sex partner, they are committing adultery.