after the date of the enactment of this Act, the Secretary of Defense shall prescribe regulations updating the Defense Enrollment Eligibility Reporting System (DEERS) to require the gender markers for members of the Armed Forces to match their biological sex, irrespective of any previous changes allowed. 4. Definitions In this Act: (1) Cross-sex hormones The term cross-sex hormones means testosterone or other androgens given to biological females at doses that are profoundly larger or more potent than would normally occur naturally in healthy biological females, or estrogen given to biological males at doses that are profoundly larger or more potent than would normally occur naturally in healthy biological males. (2) Gender The term gender means the psychological, behavioral, social, and cultural aspects of being male or female. (3) Gender dysphoria The term gender dysphoria means a marked incongruence between one’s experienced or expressed gender and biological sex. (4) Gender transition The term gender transition means the process by which a person goes from identifying with and living as a gender that corresponds to his or her biological sex to identifying with and living as a gender different from his or her biological sex, and may involve social, legal, or physical changes. (5) Gender transition procedures The term gender transition procedures — (A) means— (i) any medical or surgical intervention, including physician's services, inpatient and outpatient hospital services, or prescribed drugs related to gender transition, that seeks to alter or remove physical or anatomical characteristics or features that are typical for the individual’s biological sex or to instill or create physiological or anatomical characteristics that resemble a sex different from the individual’s birth sex, including medical services that provide puberty-blocking drugs, cross-sex hormones, or other mechanisms to promote the development of feminizing or masculinizing features (in the opposite sex)