Arkansas Code Title 5. Criminal Offenses § 5-14-102. Criminality of conduct

(1) Did not know the age of the child; or

(2) Reasonably believed the child to be fourteen (14) years of age or older.

(c)(1) When criminality of conduct depends on a child's being below fourteen (14) years of age and the actor is under twenty (20) years of age, it is an affirmative defense that the actor reasonably believed the child to be of the critical age or above.

(2) However, the actor may be guilty of the lesser offense defined by the age that the actor reasonably believed the child to be.

(d)(1) When criminality of conduct depends on a child's being below a critical age older than fourteen (14) years, it is an affirmative defense that the actor reasonably believed the child to be of the critical age or above.

(2) However, the actor may be guilty of the lesser offense defined by the age that the actor reasonably believed the child to be.