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Bills from the 2025–26 session

Assembly Bill 100

Designating athletic sports and teams operated or sponsored by public schools or private schools participating in a parental choice program based on the sex of the participants

Topics: Parochial and private schools, School: Attendance, School: Charter school, School: Health program

Vetoed by the governor

Both chambers passed it, and the governor vetoed it on Mar 31, 2026. Lawmakers did not ⁠, so it stands.

  1. Introduced, passed

    Mar 3, 2025

  2. Committee, passed

    Approved

  3. Assembly vote, passed

    Passed Mar 20, 2025

  4. Senate vote, passed

    Passed 18 to 15

  5. Governor, stopped here

    Vetoed Mar 31, 2026.

  6. Law, not reached

Latest entry in the official record, May 13, 2026: “Failed to pass notwithstanding the objections of the Governor pursuant to Joint Rule 82”

Read the governor's veto message · All vetoes this session

Read the bill

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The same bill was also filed in the Senate as SB 117. That version died when the session ended.

What it would have done

Summary by the , the Legislature's nonpartisan drafting office. It's their wording, not ours.

This bill requires each school board, independent charter school, and private school participating in a parental choice program (educational institution) that operates or sponsors an interscholastic, intramural, or club athletic team or sport to designate the athletic team or sport based on the sex of the participating pupils. The bill defines “sex” as the sex determined at birth by a physician and reflected on the birth certificate. The bill also requires an educational institution to prohibit a male pupil from 1) participating on an athletic team or in an athletic sport designated for females and 2) using a locker room designated for females. Finally, the bill requires the educational institution to notify pupils and parents if an educational institution intends to change a designation for an athletic team or sport.

Who's behind it

29 representatives are its ⁠. All 29 are Republicans.

10 more lawmakers ⁠.

See all 39 names

Authors (29)

Signed on in support (10)

Versions and amendments

Every text the Legislature printed for this bill, including proposed changes. Each opens on the Legislature's site.

How lawmakers voted

There were 5 votes on this bill.

Assembly Committee on Education vote on an amendment

Passed, 7 to 4 · Mar 13, 2025

No member-by-member record exists for this vote. Committee votes and some older sessions record totals only.

Official motion: “Report Assembly Amendment 1 adoption recommended by Committee on Education, Ayes 7, Noes 4”. Official record · This vote on its own page

Assembly Committee on Education vote to recommend it

Passed, 7 to 4 · Mar 13, 2025

No member-by-member record exists for this vote. Committee votes and some older sessions record totals only.

Official motion: “Report passage as amended recommended by Committee on Education, Ayes 7, Noes 4”. Official record · This vote on its own page

Assembly vote to pass it

Passed, 51 to 43 · Mar 20, 2025 · 5 didn't vote

See how each of the 99 representatives voted

D: Democrat, R: Republican

Yes (51)

No (43)

Didn't vote (5)

Official motion: “PASSAGE”. Official record · This vote on its own page

Senate Committee on Government Operations vote to recommend it

Passed, 3 to 2 · Jan 16, 2026

No member-by-member record exists for this vote. Committee votes and some older sessions record totals only.

Official motion: “Report concurrence recommended by Committee on Government Operations, Labor and Economic Development, Ayes 3, Noes 2”. Official record · This vote on its own page

Senate vote to pass it

Passed, 18 to 15 · Feb 11, 2026

See how each of the 33 senators voted

D: Democrat, R: Republican

Official motion: “CONCURRENCE”. Official record · This vote on its own page

What happened

  1. May 13, 2026

    The veto stood. Lawmakers didn't override it.

  2. Mar 31, 2026

    The governor vetoed it.

  3. Mar 26, 2026

    Sent to the governor.

  4. Feb 11, 2026

    The Senate passed it too, 18 to 15.

  5. Jan 16, 2026

    The committee voted to recommend passing it, 3 to 2.

  6. Jan 14, 2026

    The committee held a public hearing.

  7. Mar 21, 2025

    Sent to the Senate Committee on Government Operations, Labor and Economic Development.

  8. Mar 20, 2025

    The Senate received it.

  9. Mar 20, 2025

    The Assembly passed it, 51 to 43.

  10. Mar 20, 2025

    The Assembly adopted it.

  11. Mar 13, 2025

    Sent to the Assembly Committee on Rules.

  12. Mar 13, 2025

    The committee voted to recommend passing it, 7 to 4.

  13. Mar 6, 2025

    The committee held a public hearing.

  14. Mar 3, 2025

    Sent to the Assembly Committee on Education.

  15. Mar 3, 2025

    Introduced in the Assembly.

See the official record, word for word
  1. Mar 3, 2025 · Assembly

    Introduced by Representatives Dittrich, Knodl, Allen, Armstrong, Behnke, Brooks, Callahan, Donovan, Duchow, Goeben, Green, Gundrum, Gustafson, B. Jacobson, Kreibich, Krug, Maxey, Moses, Murphy, Mursau, Nedweski, O'Connor, Penterman, Piwowarczyk, Sortwell, Steffen, Tusler, VanderMeer and Wichgers; cosponsored by Senators Hutton, Felzkowski, Feyen, Jacque, Kapenga, Nass, Quinn, Testin, Tomczyk and Wanggaard

  2. Mar 3, 2025 · Assembly

    Read first time and referred to Committee on Education

  3. Mar 6, 2025 · Assembly

    Public hearing held

  4. Mar 11, 2025 · Assembly

    Assembly Amendment 1 offered by Representative Dittrich

  5. Mar 13, 2025 · Assembly

    Executive action taken

  6. Mar 13, 2025 · Assembly

    Report Assembly Amendment 1 adoption recommended by Committee on Education, Ayes 7, Noes 4

  7. Mar 13, 2025 · Assembly

    Report passage as amended recommended by Committee on Education, Ayes 7, Noes 4

  8. Mar 13, 2025 · Assembly

    Referred to committee on Rules

  9. Mar 18, 2025 · Assembly

    Placed on calendar 3-20-2025 by Committee on Rules

  10. Mar 20, 2025 · Assembly

    Read a second time

  11. Mar 20, 2025 · Assembly

    Assembly Amendment 1 adopted

  12. Mar 20, 2025 · Assembly

    Ordered to a third reading

  13. Mar 20, 2025 · Assembly

    Rules suspended

  14. Mar 20, 2025 · Assembly

    Read a third time and passed, Ayes 51, Noes 43

  15. Mar 20, 2025 · Assembly

    Ordered immediately messaged

  16. Mar 20, 2025 · Senate

    Received from Assembly

  17. Mar 21, 2025 · Senate

    Read first time and referred to committee on Government Operations, Labor and Economic Development

  18. Jan 14, 2026 · Senate

    Public hearing held

  19. Jan 16, 2026 · Senate

    Executive action taken

  20. Jan 16, 2026 · Senate

    Report concurrence recommended by Committee on Government Operations, Labor and Economic Development, Ayes 3, Noes 2

  21. Jan 16, 2026 · Senate

    Available for scheduling

  22. Feb 9, 2026 · Senate

    Placed on calendar 2-11-2026 pursuant to Senate Rule 18(1)

  23. Feb 11, 2026 · Senate

    Read a second time

  24. Feb 11, 2026 · Senate

    Ordered to a third reading

  25. Feb 11, 2026 · Senate

    Rules suspended to give bill its third reading

  26. Feb 11, 2026 · Senate

    Read a third time and concurred in, Ayes 18, Noes 15

  27. Feb 11, 2026 · Senate

    Ordered immediately messaged

  28. Feb 12, 2026 · Assembly

    Received from Senate concurred in

  29. Feb 19, 2026 · Assembly

    LRB correction (Assembly Amendment 1)

  30. Feb 19, 2026 · Assembly

    Report correctly enrolled on 2-19-2026

  31. Mar 26, 2026 · Assembly

    Presented to the Governor on 3-26-2026

  32. Mar 31, 2026 · Assembly

    Report vetoed by the Governor on 3-31-2026

  33. May 12, 2026 · Assembly

    Placed on calendar 5-12-2026 pursuant to Joint Rule 82 (2)(a)

  34. May 13, 2026 · Assembly

    Failed to pass notwithstanding the objections of the Governor pursuant to Joint Rule 82

Terms on this page

Veto override

Lawmakers can still pass a bill the governor vetoed, but it takes two-thirds of each chamber.

More in the glossary

Legislative Reference Bureau

The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.

Official term: LRB analysis. More in the glossary

Author

A lawmaker who formally puts a bill forward. The text itself is drafted by the Legislative Reference Bureau.

Official term: Author, coauthor. More in the glossary

Signed on in support

Lawmakers who back a bill without being one of its authors, often from the other chamber.

Official term: Cosponsor. More in the glossary

Roll call

A vote where each lawmaker's yes or no is recorded by name.

Official term: Roll call vote. More in the glossary

From the Wisconsin Legislature's official record, checked Sep 15, 2026. See the source

Veto override

Lawmakers can still pass a bill the governor vetoed, but it takes two-thirds of each chamber.

More in the glossary

Legislative Reference Bureau

The Legislature's nonpartisan office that drafts bills and writes the summary at the top of each one.

Official term: LRB analysis

More in the glossary

Author

A lawmaker who formally puts a bill forward. The text itself is drafted by the Legislative Reference Bureau.

Official term: Author, coauthor

More in the glossary

Signed on in support

Lawmakers who back a bill without being one of its authors, often from the other chamber.

Official term: Cosponsor

More in the glossary

Roll call

A vote where each lawmaker's yes or no is recorded by name.

Official term: Roll call vote

More in the glossary