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*hb0663*
HOUSE BILL 663
M3, M5 6lr1042
By: Delegate Rosenberg Delegates Rosenberg, Behler, Boyce, Foley, Guyton,
Holmes, J. Lewis, Odom, and Stein
Introduced and read first time: January 30, 2026
Assigned to: Environment and Transportation
Committee Report: Favorable with amendments
House action: Adopted
Read second time: February 26, 2026
CHAPTER ______
AN ACT concerning 1
Department of the Environment – Federal Environmental Policy on Greenhouse 2
Gas Emissions – Reporting 3
FOR the purpose of requiring, beginning on or before a certain date and with a certain 4
frequency thereafter, the Department of the Environment to report to the General 5
Assembly on certain changes in federal environmental policy on greenhouse gas 6
emissions; and generally relating to greenhouse gas emissions federal environmental 7
policy. 8
BY adding to 9
Article – Environment 10
Section 2–1213 11
Annotated Code of Maryland 12
(2013 Replacement Volume and 2025 Supplement) 13
SECTION 1. BE IT ENACTED BY THE GENERAL ASS EMBLY OF MARYLAND, 14
That the Laws of Maryland read as follows: 15
Article – Environment 16
2–1213. 17
2 HOUSE BILL 663
(A) ON OR BEFORE JULY 1, 2026, AND EVERY 6 MONTHS THEREAFTER, THE 1
DEPARTMENT SHALL REPORT TO THE GENERAL ASSEMBLY, IN ACCORDANCE WITH 2
§ 2–1257 OF THE STATE GOVERNMENT ARTICLE, ON: 3
(1) ANY CHANGES IN FEDERA L ENVIRONMENTAL POLICY ON 4
GREENHOUSE GAS EMISSIONS THAT HAVE BEEN DEEMED LEGALLY VALID BY A FINAL 5
DECISION OF A FEDERAL COURT, INCLUDING ANY CHANGE THAT: 6
(I) RESCINDS A FINDING TH AT THE GREENHOUSE GA S 7
EMISSIONS FROM NEW MOTOR VEHICLES AND ENGINES CAUSE AIR POLLUTION THAT 8
MAY ENDANGER PUBLIC HEALTH OR WELFARE; 9
(II) REPEALS GREENHOUSE GA S EMISSIONS STANDARD S FOR 10
MOTOR VEHICLES AND ENGINES; OR 11
(III) REPEALS GREENHOUSE GA S EMISSIONS STANDARD S FOR 12
STATIONARY SOURCES; AND OR 13
(IV) IMPACTS THE DEPARTMENT’S ADMINISTRATION OF ANY 14
FEDERALLY DELEGATED AUTHORITY; AND 15
(2) IF THERE HAS BEEN A C HANGE IN FEDERAL ENVIRONMENTAL 16
POLICY ON GREENHOUSE GAS EM ISSIONS THAT IS REQUIRED TO BE REPORTED 17
UNDER PARAGRAPH (1) OF THIS SECTION , THE STEPS THE STATE IS TAKING IN 18
RESPONSE TO THE CHANGE. 19
(B) (1) THE INITIAL REPORT SU BMITTED UNDER SUBSEC TION (A) OF 20
THIS SECTION SHALL D ESCRIBE ANY CHANGES IN FEDERAL ENVIRONMENTAL 21
POLICY ON GREENHOUSE GAS EMISSIONS THAT HAVE OCCURRED SINCE JANUARY 1, 22
2024. 23
(2) EACH REPORT SUBMITTED AFTER THE INITIAL RE PORT SHALL 24
DESCRIBE ANY CHANGES IN FEDERAL ENVIRONMENTAL POLICY ON GREENHOUSE 25
GAS EMISSIONS THAT HAVE OCCURRED D URING THE IMMEDIATE LY PRECEDING 6 26
MONTH PERIOD. 27
SECTION 2. AND BE IT FURTHER ENACTED, That this Act shall take effect June 28
1, 2026. It shall remain effective for a period of 3 years and, at the end of May 31, 2029, 29
this Act, with no further action required by the General A ssembly, shall be abrogated and 30
of no further force and effect. 31