SB 1418 Arizona Senate · 57th Legislature - Second Regular Session

corporation commission; small modular reactors

SB 1418 amends Arizona zoning law to allow small modular reactors (SMRs) to be constructed and operated without local zoning restrictions in counties with fewer than 500,000 residents, provided they are located at a site where a large industrial energy user has already secured all necessary zoning approvals. This prevents counties from imposing additional zoning rules on such SMR projects, specifically targeting smaller counties (e.g., excluding Maricopa County, which exceeds 500,000 residents). The bill defines key terms like "colocated" and "large industrial energy user" based on rules set by the Corporation Commission. It directly affects developers of SMRs and local governments in smaller counties, aiming to streamline clean energy infrastructure development by removing regulatory barriers.
Bill status vetoed 4 of 5 stages cleared
Introduction
Jan 2026
Committee Review
Mar 2026
Senate Passage
Jun 2026
House Passage
Jun 2026
Vetoed
Jun 2026
Introduced Jan 28, 2026 Vetoed Jun 19, 2026
Maddy AI version diff · 2 comparisons

What changed between versions

House Engrossed Version (06/09/2026) Senate Engrossed Version (03/03/2026) · 5 edits · Mar 3, 2026
MODERATE
The bill was amended to remove a specific exemption for small modular reactors (SMRs) in counties with fewer than 500,000 people and replace it with a new regulatory framework. The changes shift the focus from a blanket exemption to a system where SMRs must be 'colocated' with a 'large industrial energy user' to qualify for streamlined approval. The Senate version also adds detailed definitions for these terms and requires the Corporation Commission to adopt specific rules regarding distance and energy demand to prevent discrimination.
Scope change
The bill's scope changed from allowing SMRs in small counties without a certificate of environmental compatibility to requiring them to be paired with large industrial energy users and subject to new Commission-defined rules.
ELIGIBILITY

Deleted a provision that exempted small modular reactors from environmental certification in counties with fewer than 500,000 residents.

Added a requirement that small modular reactors must be colocated with a 'large industrial energy user' to qualify for streamlined approval.

DEFINITION

Introduced new definitions for 'colocated with' and 'large industrial energy user,' requiring the Corporation Commission to specify distance limits and energy demand metrics.

Added a definition for 'small modular reactor' that sets a minimum eligible nameplate rating of 200 megawatts and allows the Commission to favor reactors with specific safety features.

REQUIREMENT

Changed the regulatory approach from a county-based exemption to a state-level rule-making process requiring the Corporation Commission to define technical standards.

Floor votes · House Jun 9, 2026

How they voted

This bill passed the Senate by voice vote (no roll call recorded).
Full legislative history

Actions timeline

Total actions
20
Key actions
10
Committee
2
Amendments
1
Jun 19, 2026
Vetoed
Vetoed by Governor
executive
Jun 11, 2026
Upper · Passed
PASSED
upper
Jun 9, 2026
Lower · Passed
PASSED
lower
Jun 1, 2026
Lower · Passed
DPA
lower
Jun 1, 2026
Lower · Passed
PASSED
lower
Apr 7, 2026
Lower · Passed
DP
lower
Mar 10, 2026
Lower · Passed
DP
lower
Mar 3, 2026
Upper · Passed
PASSED
upper
Feb 25, 2026
Upper · Passed
PASSED
upper
Feb 25, 2026
Upper · Passed
DP
upper
Feb 10, 2026
Upper · Passed
DP
upper
1 primary · 0 co-sponsors

Sponsors

Role
Legislator
Party
State
District
P
Photo of Frank Carroll
Frank Carroll
RRepublican
AZ
28