Iowa Code § 90A.12: Age requirement for amateur boxing and mixed martial arts contestants.

1. A person shall not participate as a contestant in an organized amateur boxing contest unless each contestant participating in the contest meets the age requirements of USA boxing incorporated, or its successor organization. A birth certificate, or similar document validating the contestant’s date of birth, must be submitted at the time of the prefight physical examination in order to determine eligibility.

2. Subsection 1 does not apply to contestants in regional, national, or international organized amateur boxing contests or to organized amateur boxing contests involving contestants who are serving in the military service.

3. A person shall not be a contestant in a mixed martial arts match unless the contestant is eighteen years of age or older. Each contestant shall submit to the commissioner a certified birth certificate, or similar document, validating the contestant’s date of birth prior to the match in order to verify the contestant’s eligibility.