Marriage licenses
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
A marriage license shall be issued by the clerk of the court in the absence of any showing that the proposed marriage would be invalid under any provision of this part or tribal custom, and upon written application of an unmarried male and unmarried female, both of whom must be eighteen (18) years or older. If either party to the marriage is under the age of eighteen (18), that party must have the written consent of parent or his or her legal guardian.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.