What AB 2484 does
An act to amend Sections 120480, 120481, 120485, and 120486 of, and to repeal Section 120482 of, the Public Utilities Code, relating to transportation.
The Mills-Deddeh Transit Development Act establishes the San Diego Metropolitan Transit Development Board, also known as the San Diego Metropolitan Transit System (MTS), governed by a 15-member board with specified powers and duties related to the operation of public transit services in the southern portion of the County of San Diego. The act authorizes MTS to impose a transactions and use tax of up to 0.5% for public transit purposes within its jurisdiction, or a portion of its jurisdiction, pursuant to the Transactions and Use Tax Law and subject to voter approval and various other requirements.
This bill would also authorize those taxes to be imposed by a qualified voter initiative. To the extent that the bill would impose additional duties on a county elections official, the bill would impose a state-mandated local program.
The Transactions and Use Tax Law limits the combined rate of all taxes that may be imposed in accordance with that law in any county to 2%.
This bill would prohibit the tax rate of 0.5% described above that may be imposed by MTS or a qualified voter initiative from being considered for purposes of the combined rate limit under the Transactions and Use Tax Law.
The California Constitution requires the state to reimburse local agencies and school districts for certain costs mandated by the state. Statutory provisions establish procedures for making that reimbursement.
This bill would provide that, if the Commission on State Mandates determines that the bill contains costs mandated by the state, reimbursement for those costs shall be made pursuant to the statutory provisions noted above.
Summary from the Legislative Counsel's Digest of the enrolled text, August 30, 2026. Read the full text on leginfo.
How it got here
Assemblymember Alvarez introduced AB 2484 on February 20, 2026, with coauthors Assembly Members Ward and Bennett. The text was amended 2 times, and heard in 6 committee hearings before its final floor votes.
- Assembly Floor, May 26, 2026: 46 ayes, 21 noes.
- Senate Floor, August 26, 2026: 30 ayes, 10 noes.
Committee votes along the way:
- Assembly Elections, April 15, 2026: Do pass and be re-referred to the Committee on [Local Government], 6-2.
- Assembly Local Government, April 22, 2026: Do pass and be re-referred to the Committee on [Appropriations], 8-2.
- Assembly Appropriations, May 14, 2026: Do pass as amended., 11-4.
- Senate Elections and Constitutional Amendments, June 16, 2026: Do pass, but first be re-referred to the Committee on [Transportation], 4-0.
- Senate Transportation, June 23, 2026: Do pass, but first be re-referred to the Committee on [Appropriations], 8-4.
Who supports and opposes AB 2484
The Senate Floor Analyses analysis dated August 5, 2026 lists 20 organizations in support and 3 in opposition. When Assembly Elections first listed positions on April 13, 2026, the count was 8 in support and 2 opposed. By the Senate Floor Analyses analysis of August 5, 2026 it was 20 to 3.
In support: San Diego Metropolitan Transit System (sponsor); Council President Joe Lacava, District 1, City of San Diego; Council President Pro Tem Kent Lee, District 6, City of San Diego; Councilmember Stephen Whitburn, District 3, City of San Diego; Councilmember Raul A. Campillo, District 7, City of San Diego; Councilmember Vivian Moreno, District 8, City of San Diego; Councilmember Sean Elo-Rivera, District 9, City of San Diego; Amalgamated Transit Union; and 12 more.
Opposed: California Association of Realtors; California Taxpayers Association; Howard Jarvis Taxpayers Association.
Read the Senate Floor Analyses analysis.
What happens next
It reached the Governor's desk on September 3, 2026. Bills presented after the Legislature adjourned on August 31 must be signed or vetoed within thirty days.
The Governor can sign the bill, veto it, or let it become law without a signature. Until the decision, sign and veto request letters are the remaining channel, and the Department of Finance's enrolled bill report carries weight on anything with a fiscal effect. If signed, most provisions take effect January 1, and implementation moves to the agencies named in the bill.
What it means for transportation organizations
Two decisions follow from a bill at this stage. The first is whether to weigh in with the Governor's office before the thirty-day window closes. The second is how to prepare for implementation if it becomes law: which agency writes the rules, when the comment period opens, and which obligations begin January 1.
The transportation group at Capitol Axis handles that for transportation clients.
Questions about AB 2484
What does AB 2484 do?
This bill would also authorize those taxes to be imposed by a qualified voter initiative. To the extent that the bill would impose additional duties on a county elections official, the bill would impose a state-mandated local program.
Has AB 2484 passed the California Legislature?
It reached the Governor's desk on September 3, 2026. Bills presented after the Legislature adjourned on August 31 must be signed or vetoed within thirty days.
Who supports and opposes AB 2484?
The Senate Floor Analyses analysis dated August 5, 2026 lists 20 organizations in support and 3 in opposition. Supporters include San Diego Metropolitan Transit System (sponsor); Council President Joe Lacava, District 1, City of San Diego; Council President Pro Tem Kent Lee, District 6, City of San Diego. Opponents include California Association of Realtors; California Taxpayers Association; Howard Jarvis Taxpayers Association.
What happens next with AB 2484?
The Governor can sign it, veto it, or let it become law without a signature. Until then, sign and veto request letters are the remaining channel, and the Department of Finance's enrolled bill report carries weight on anything with a fiscal effect.