This bill aims to amend chapter 110 of title 18, United States Code, by establishing a federal prohibition on gender transition procedures for minors. It makes it a criminal offense for any physical or mental health care professional to knowingly perform or aid in such procedures on an individual under the age of 18. Professionals found in violation could face federal fines, imprisonment for up to five years, or both. The legislation explicitly states that minors on whom these procedures are performed cannot be arrested or prosecuted under this section. Instead, it grants these individuals the right to bring a civil action for appropriate relief against any professional involved in performing the gender transition procedure. Federal jurisdiction is established through various connections to interstate or foreign commerce, including travel, payment, communication, or the use of instruments that have moved across state lines. The bill provides comprehensive definitions, specifying "minor" as an individual under 18 and defining "gender transition" as the process of identifying or presenting differently from one's biological sex. A "gender transition procedure" is broadly defined to include a wide array of hormonal and surgical interventions, such as puberty blockers, cross-sex hormones, and numerous surgeries like mastectomies, hysterectomies, phalloplasties, and vaginoplasties. It also covers the removal of any otherwise healthy or non-diseased body part or tissue for the purpose of gender transition. However, the bill explicitly excludes treatments for medically verifiable disorders of sex development, life-threatening physical illnesses, precocious puberty, and male circumcision.