Amends the Interscholastic Athletic Organization Act. Provides that any athletic team or sport that is under the jurisdiction of an association or entity that provides for interscholastic athletics or athletic competition among schools and student must be expressly designated as (i) a male athletic team or sport, (ii) a female athletic team or sport, or (iii) a coeducational athletic team or sport. Provides that an athletic team or sport designated as being female is available only to participants who are female, based on their biological sex. Requires a school district or nonpublic school to obtain a written statement signed by a student's parent or guardian or the student verifying the student's age, biological sex, and that the student has not taken performance enhancing drugs; provides for a penalty for false or misleading statements. Prohibits a governmental entity or an association or entity that provides for interscholastic athletics or athletic competition among schools and students from entertaining a complaint, opening an investigation, or taking any other adverse action against a school district or nonpublic school for maintaining athletic teams or sports in accordance with these provisions.

Amends the Interscholastic Athletic Organization Act. Provides that any athletic team or sport that is under the jurisdiction of an association or entity that provides for interscholastic athletics or athletic competition among schools and students must be expressly designated as (i) a male athletic team or sport, (ii) a female athletic team or sport, or (iii) a coeducational athletic team or sport. Provides that an athletic team or sport designated as being female is available only to participants who are female, based on their biological sex. Requires a school district or nonpublic school to obtain a written statement signed by a student's parent or guardian or the student verifying the student's age, biological sex, and that the student has not taken performance enhancing drugs; provides for a penalty for false or misleading statements. Prohibits a governmental entity or an association or entity that provides for interscholastic athletics or athletic competition among schools and students from entertaining a complaint, opening an investigation, or taking any other adverse action against a school district or nonpublic school for maintaining athletic teams or sports in accordance with these provisions.

Creates the Classification by Biological Sex Act. Sets forth findings. Provides that any public school or school district and any State or local agency, department, or office that collects vital statistics for the purpose of complying with antidiscrimination laws or for the purpose of gathering public health, crime, economic, or other data shall classify each individual who is part of the collected data set as either male or female at birth. Amends the Statute on Statutes. Sets forth the meaning of the following terms as used in any statute or any rule or regulation: sex; female and male; woman and girl; man and boy; and mother and father.

Amends the Medical Practice Act of 1987. Provides that sex-reassignment procedures are prohibited for patients younger than 18 years of age. Provides that if sex-reassignment procedures are administered or performed on patients 18 years of age or older, consent must be provided as specified. Provides that the Department of Financial and Professional Regulation shall revoke the license of any physician who willfully or actively violates the prohibition on sex-reassignment procedures for patients younger than 18 years of age. Amends the Hospital Licensing Act and the Ambulatory Surgical Treatment Center Act. Adds a failure to comply with the provisions as grounds for fines, license denial, license suspension or revocation, or refusal to renew a hospital or facility's license. Amends the Illinois Administrative Procedure Act to provide for emergency rulemaking.

Amends the Interscholastic Athletic Organization Act. Provides that any athletic team or sport that is under the jurisdiction of an association or entity that provides for interscholastic athletics or athletic competition among schools and student must be expressly designated as (i) a male athletic team or sport, (ii) a female athletic team or sport, or (iii) a coeducational athletic team or sport. Provides that an athletic team or sport designated as being female is available only to participants who are female, based on their biological sex. Requires a school district or nonpublic school to obtain a written statement signed by a student's parent or guardian or the student verifying the student's age, biological sex, and that the student has not taken performance enhancing drugs; provides for a penalty for false or misleading statements. Prohibits a governmental entity or an association or entity that provides for interscholastic athletics or athletic competition among schools and students from entertaining a complaint, opening an investigation, or taking any other adverse action against a school district or nonpublic school for maintaining athletic teams or sports in accordance with these provisions.