HB 593 Maryland House of Delegates · 2026 Regular Session

Criminal Law - Interference With Critical Infrastructure or a Public Safety Answering Point

HB 593 amends Maryland's criminal law to specifically prohibit unauthorized actions intended to disrupt critical infrastructure or public safety answering points. It makes it a crime to intentionally access, copy data from, or possess access codes for systems like power grids, emergency call centers, or transportation networks with the intent to impair their function. The bill defines "critical infrastructure" as systems vital to public security, health, safety, or utilities, and explicitly includes ransomware attacks as a prohibited act. This law directly affects individuals who interfere with these essential systems, imposing criminal penalties for intentional disruption.
Bill status signed all 5 stages cleared
Introduction
Jan 2026
Committee Review
Apr 2026
House of Delegates Passage
Apr 2026
Senate Passage
Apr 2026
Signed into Law
May 2026
Introduced Jan 28, 2026 Signed May 12, 2026
Maddy AI version diff · 1 comparison

What changed between versions

First - Criminal Law - Interference With Critical Infrastructure or a Public Safety Answering Point Third - Criminal Law - Interference With Critical Infrastructure or a Public Safety Answering Point · 2 edits
MINOR
The bill text has been updated to reflect its progression from the first reading to the third reading, incorporating committee approval and final adoption. Substantively, the definitions for 'Access' and 'Aggregate amount' were reordered to appear earlier in the statute, while the core definitions for critical infrastructure and cyber terms remain unchanged.
TECHNICAL

The bill header was updated to show committee approval, adoption, and the second reading date, indicating the bill has passed its legislative hurdles.

The order of the definitions for 'Access' and 'Aggregate amount' was swapped; 'Access' now appears before 'Aggregate amount' in the list of defined terms.

Floor votes · Senate Mar 25, 2026 · House of Delegates Feb 20, 2026

How they voted

470
Passed · 2 other
Total votes 49
Mar 25, 2026
D Democratic36
35 Yea 1
97% Yea
R Republican13
12 Yea 1
92% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
14
Key actions
10
Committee
6
May 12, 2026
Signed into law
Approved by the Governor - Chapter 521
executive
Apr 13, 2026
Lower · Passed
Returned Passed
lower
Apr 13, 2026
Upper · Passed
Third Reading Passed
upper
Apr 8, 2026
Upper · Passed
Favorable Adopted Second Reading Passed
upper
Apr 8, 2026
Upper · Passed
Favorable Report by Judicial Proceedings
upper
Mar 25, 2026
Senate · Passed
Senate Vote: pass (47-0-2)
senate
Feb 27, 2026
Committee
Referred Judicial Proceedings
upper
Feb 26, 2026
Lower · Passed
Third Reading Passed
lower
Feb 24, 2026
Lower · Passed
Favorable Adopted
lower
Feb 23, 2026
Lower · Passed
Favorable Report by Judiciary
lower
Feb 20, 2026
House Of Delegates · Passed
House of Delegates Vote: pass (137-0-5)
house of delegates
Jan 28, 2026
Committee
First Reading Judiciary
lower
5 primary · 0 co-sponsors

Sponsors