SB 1501 Arizona Senate · 57th Legislature - First Regular Session

grid security; cybersecurity; reviews; commission

SB 1501 requires Arizona's regulatory commission to conduct annual reviews of grid security and cybersecurity. The bill directs the commission to evaluate technologies for modern grid operations, assess electromagnetic pulse (EMP) threats, and ensure continuous electricity supply, while also mandating biennial reviews of cybersecurity protocols. Investor-owned utilities must address identified grid security deficiencies and develop cost-effective implementation plans, though electric cooperatives and public power entities are exempt. The bill, which was vetoed by the governor in April 2025, aims to strengthen grid resilience against physical and cyber threats.

Issues: ✓ Technology

Bill status vetoed 4 of 5 stages cleared

Introduction

Feb 2025

Committee Review

Mar 2025

Senate Passage

Apr 2025

House Passage

Mar 2025

Vetoed

Apr 2025

Introduced Feb 4, 2025 Vetoed Apr 18, 2025

Maddy AI version diff · 2 comparisons

What changed between versions

House Engrossed Version → Senate Engrossed Version · 5 edits · Apr 15, 2025

MODERATE

The bill was revised to shift from a biennial grid security review to an annual review, with expanded requirements for evaluating grid technologies that support two-way electricity flow. The Senate version also added specific exemptions for electric cooperatives and public power entities from certain security plan requirements, while maintaining the two-year review cycle for cybersecurity protocols. These changes reflect a more frequent oversight approach while clarifying which utility types are subject to specific security obligations.

Scope change

The bill now explicitly exempts electric cooperatives and public power entities from certain security plan requirements that apply to investor-owned utilities.

TIMELINE

Changed grid security review frequency from 'at least once every two years' to 'annual' review

REQUIREMENT

Added requirement for commission to evaluate technologies that accommodate two-way electricity flow

Added new requirement for commission to encourage utilities to rectify deficiencies and develop security plans

Modified cybersecurity protocol review requirement from annual submission to biennial review

ELIGIBILITY

Added exemption for electric cooperatives and public power entities from certain security plan requirements

Floor votes · House Mar 31, 2025

How they voted

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

Full legislative history

Actions timeline

Total actions

Key actions

Committee

Amendments

Apr 18, 2025

Vetoed

Vetoed by Governor

executive

Apr 15, 2025

Upper · Passed

PASSED

upper

Mar 31, 2025

Lower · Passed

PASSED

lower

Mar 19, 2025

Lower · Passed

DPA

lower

Mar 11, 2025

Lower · Passed

lower

Feb 26, 2025

Upper · Passed

PASSED

upper

Feb 25, 2025

Upper · Passed

DPA

upper

Feb 11, 2025

Upper · Passed

DPA

upper

1 primary · 0 co-sponsors