KLS Keeping Law Simple Legislation in plain English

Straight-ahead summaries built from the official bill text. We keep the source links front and center and leave the decision up to you.

Back to Missouri

HB1663 • 2026

Modifies guidelines for student participation in athletic contests organized by sex

Modifies guidelines for student participation in athletic contests organized by sex

Education
Passed Legislature

This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.

Sponsor
Seitz, Brian (156)
Last action
2026-04-28
Official status
04/28/2026 - Public Hearing Held (S)
Effective date
2026-08-28

Plain English Breakdown

The official source material does not provide specific details about the requirements for organizing sports teams based on biological sex or exemptions for private and religious schools.

Changes Rules for Student Sports Teams Based on Gender

This bill modifies guidelines for student participation in school sports based on sex.

What This Bill Does

  • Updates guidelines for student participation in athletic contests organized by sex.

Who It Names or Affects

  • Public school students who want to join sports teams.
  • School administrators and coaches responsible for organizing sports teams.

Terms To Know

Biological sex
The physical characteristics that determine if someone is male or female, based on their body's development.
Gender identity
A person’s internal sense of being a man, woman, both, neither, or something else.

Limits and Unknowns

  • The bill does not specify how schools should handle students who do not fit into traditional gender categories.
  • It is unclear what enforcement measures will be put in place to ensure compliance with these new rules.

Amendments

These notes stay tied to the official amendment files and metadata from the legislature.

3933H02.01H

3933H02.01H • Hurlbert

Distributed

Plain English: The amendment changes eligibility rules for female students who are undergoing hormone treatment for gender dysphoria or transsexualism to compete in female-designated athletic contests.

  • Removes the previous rule that allowed some female students with gender dysphoria or transsexualism to participate in female sports if they were taking hormones.
  • Adds a new rule stating that these students are no longer eligible to compete in female-designated athletics.
  • The amendment does not specify what happens to existing rules for male-to-female transgender athletes or other aspects of the bill's guidelines.

Bill History

  1. 2026-04-28 Missouri House of Representatives and Missouri Senate

    Public Hearing Held (S)

  2. 2026-04-23 Missouri House of Representatives and Missouri Senate

    Public Hearing Scheduled (S) - Tuesday, April 28, 2026, 8:00 a.m., Senate Lounge - 3rd Floor

  3. 2026-03-12 Missouri House of Representatives and Missouri Senate

    Second read and referred: Education(S)

  4. 2026-02-26 Missouri House of Representatives and Missouri Senate

    Executive Session Completed (H)

  5. 2026-02-26 Missouri House of Representatives and Missouri Senate

    Voted Do Pass (H)

  6. 2026-02-26 Missouri House of Representatives and Missouri Senate

    Reported Do Pass (H) - AYES: 5 NOES: 2 PRESENT: 0

  7. 2026-02-26 Missouri House of Representatives and Missouri Senate

    Taken Up for Third Reading (H)

  8. 2026-02-26 Missouri House of Representatives and Missouri Senate

    Third Read and Passed (H) - AYES: 98 NOES: 37 PRESENT: 2

  9. 2026-02-26 Missouri House of Representatives and Missouri Senate

    Reported to the Senate and First Read (S)

  10. 2026-02-24 Missouri House of Representatives and Missouri Senate

    Referred: Fiscal Review(H)

  11. 2026-02-23 Missouri House of Representatives and Missouri Senate

    Taken Up for Perfection (H)

  12. 2026-02-23 Missouri House of Representatives and Missouri Senate

    Title of Bill - Agreed To

  13. 2026-02-23 Missouri House of Representatives and Missouri Senate

    HCS Adopted (H)

  14. 2026-02-23 Missouri House of Representatives and Missouri Senate

    Perfected (H)

  15. 2026-02-16 Missouri House of Representatives and Missouri Senate

    Placed on the Informal Perfection Calendar (H)

  16. 2026-02-10 Missouri House of Representatives and Missouri Senate

    Executive Session Completed (H)

  17. 2026-02-10 Missouri House of Representatives and Missouri Senate

    Voted Do Pass (H)

  18. 2026-02-10 Missouri House of Representatives and Missouri Senate

    Reported Do Pass (H) - AYES: 6 NOES: 3 PRESENT: 0

  19. 2026-01-29 Missouri House of Representatives and Missouri Senate

    Referred: Rules - Administrative(H)

  20. 2026-01-28 Missouri House of Representatives and Missouri Senate

    HCS Reported Do Pass (H) - AYES: 9 NOES: 4 PRESENT: 0

  21. 2026-01-27 Missouri House of Representatives and Missouri Senate

    Executive Session Completed (H)

  22. 2026-01-27 Missouri House of Representatives and Missouri Senate

    HCS Voted Do Pass (H)

  23. 2026-01-20 Missouri House of Representatives and Missouri Senate

    Public Hearing Completed (H)

  24. 2026-01-08 Missouri House of Representatives and Missouri Senate

    Read Second Time (H)

  25. 2026-01-08 Missouri House of Representatives and Missouri Senate

    Referred: Emerging Issues(H)

  26. 2026-01-07 Missouri House of Representatives and Missouri Senate

    Read First Time (H)

  27. 2025-12-01 Missouri House of Representatives and Missouri Senate

    Prefiled (H)

Official Summary Text

Modifies guidelines for student participation in athletic contests organized by sex

Current Bill Text

Read the full stored bill text 
UNOFFICIAL COPY
SECOND REGULAR SESSION
103rd General Assembly
State of Missouri - House of Representatives
HBs FOR THIRD READING
HCS HBs 1663, 1607 & 1973
SEITZ (156)
PARTICIPATION IN ATHLETICS COMPETITIONS
3933H.02P
2/26/2026Date :Session Day : 28
Roll Call : 2
Y - ALLEN Y - DURNELL Y - LEWIS Y - SEITZ
Y - AMATO @ - EALY Y - LOY Y - SELF
N - ANDERSON Y - ELLIOTT Y - LUCAS @ - SHARP 37
@ - APPELBAUM Y - FALKNER N - MACKEY Y - SHARPE 4
N - AUNE Y - FARNAN N - MANSUR Y - SHIELDS
Y - BANDERMAN N - FOGLE Y - MARTIN Y - SIMMONS
N - BARNES @ - FOUNTAIN HENDERS Y - MATTHIESEN N - SMITH 46
Y - BILLINGTON Y - FOWLER Y - MAYHEW @ - SMITH 68
Y - BLACK N - FUCHS @ - MCGAUGH P - SMITH 74
Y - BOGGS Y - GALLICK Y - MCGIRL N - STEINHOFF
N - BOSLEY Y - GRAGG Y - MEIRATH N - STEINMETZ
P - BOYKIN @ - GRIFFITH Y - MILLER Y - STEINMEYER
N - BOYKO @ - HADEN @ - MOSLEY Y - STINNETT
Y - BROMLEY N - HALES Y - MURPHY @ - STRICKLER
Y - BROWN Y - HALEY N - MURRAY Y - TAYLOR 48
N - BURTON Y - HARBISON Y - MYERS N - TAYLOR 84
N - BUSH Y - HARDWICK Y - NOLTE N - TERRY
Y - BUSICK @ - HAUSMAN Y - OEHLERKING N - THOMAS
N - BUTZ @ - HEIN Y - OVERCAST Y - THOMPSON
@ - BYRNES Y - HEWKIN Y - OWEN Y - TITUS
Y - CASTEEL Y - HINMAN Y - PARKER Y - VANSCHOIACK
Y - CATON Y - HOVIS Y - PERKINS Y - VEIT
Y - CHAPPELL Y - HRUZA @ - PETERS Y - VERNETTI
Y - CHRIST Y - HURLBERT Y - PHELPS Y - VIOLET
Y - CHRISTENSEN N - INGLE N - PLANK Y - VOSS
N - CLEMENS Y - IRWIN Y - POLLITT N - WALSH MOORE
Y - COLEMAN @ - JACOBS Y - POUCHE Y - WARWICK
N - COLLINS @ - JAMISON N - PRICE N - WEBER
Y - COOK @ - JOBE N - PROUDIE Y - WELLENKAMP
@ - COSTLOW N - JOHNSON N - REED Y - WEST
N - CROSSLEY Y - JONES 12 Y - REEDY Y - WHALEY
Y - CUPPS @ - JONES 88 Y - REUTER Y - WILLIAMS
Y - DAVIDSON Y - JORDAN Y - RIGGS Y - WILSON
Y - DAVIS Y - JUSTUS Y - RILEY Y - WOLFIN
N - DEAN Y - KALBERLOH Y - ROBERTS N - WOODS
Y - DEATON Y - KEATHLEY @ - RUSH Y - WRIGHT
Y - DIEHL Y - KELLEY Y - SASSMANN N - YOUNG
Y - DOLAN N - KIMBLE Y - SCHMIDT @ - ZIMMERMANN
N - DOLL Y - KNIGHT Y - SCHULTE Y - MR SPEAKER
N - DOUGLAS Y - LAUBINGER
Total Yes : 98 Total Present : 2
Total No : 37 Total Absent : 21
Vacancies : 5