10 U.S.C. § 920b: Art. 120b. Rape and sexual assault of a child

commits a sexual act upon a child who has not attained the age of 12 years; or using force against any person; threatening or placing that child in fear; rendering that child unconscious; or administering to that child a drug, intoxicant, or other similar substance; Any person subject to this chapter who commits a sexual act upon a child who has attained the age of 12 years is guilty of sexual assault of a child and shall be punished as a court-martial may direct. Any person subject to this chapter who commits a lewd act upon a child is guilty of sexual abuse of a child and shall be punished as a court-martial may direct. In a prosecution under this section, it need not be proven that the accused knew the age of the other person engaging in the sexual act or lewd act. It is not a defense that the accused reasonably believed that the child had attained the age of 12 years. In a prosecution under this section, it need not be proven that the accused knew that the other person engaging in the sexual act or lewd act had not attained the age of 16 years, but it is a defense in a prosecution under subsection (b) (sexual assault of a child) or subsection (c) (sexual abuse of a child), which the accused must prove by a preponderance of the evidence, that the accused reasonably believed that the child had attained the age of 16 years, if the child had in fact attained at least the age of 12 years. In a prosecution under this section, in proving that a person made a threat, it need not be proven that the person actually intended to carry out the threat or had the ability to carry out the threat. Lack of consent is not an element and need not be proven in any prosecution under this section. A child cannot consent to any sexual act, lewd act, or use of force. The terms “sexual act” and “sexual contact” have the meanings given those terms in section 920(g) of this title (article 120(g)), except that the term “sexual act” also includes the intentional touching, not through the clothing, of the genitalia of another person who has not attained the age of 16 years with an intent to abuse, humiliate, harass, degrade, or arouse or gratify the sexual desire of any person. the use of a weapon; the use of such physical strength or violence as is sufficient to overcome, restrain, or injure a child; or inflicting physical harm. The term “threatening or placing that child in fear” means a communication or action that is of sufficient consequence to cause the child to fear that non-compliance will result in the child or another person being subjected to the action contemplated by the communication or action. The term “child” means any person who has not attained the age of 16 years. any sexual contact with a child; intentionally exposing one’s genitalia, anus, buttocks, or female areola or nipple to a child by any means, including via any communication technology, with an intent to abuse, humiliate, or degrade any person, or to arouse or gratify the sexual desire of any person; intentionally communicating indecent language to a child by any means, including via any communication technology, with an intent to abuse, humiliate, or degrade any person, or to arouse or gratify the sexual desire of any person; or any indecent conduct, intentionally done with or in the presence of a child, including via any communication technology, that amounts to a form of immorality relating to sexual impurity which is grossly vulgar, obscene, and repugnant to common propriety, and tends to excite sexual desire or deprave morals with respect to sexual relations.