Regulations for the Control of Ionizing Radiation (COMAR

COMAR 26.12.01 

COMAR includes the "Regulations for the Control of Ionizing Radiation (1994)", which is incorporated by reference. The purpose of these regulations is to protect the public and the environment from the hazards associated with ionizing radiation. The regulation includes provisions which regulate the use and possession of radioactive materials and radiation producing machines within the state. Applicable Parts of these regulations must be maintained on-site by radiation machine facilities and radioactive material licensees.

​​​​​View the unofficial C​OMAR incorporated regulations here​. This link includes proposed changes to COMAR when applicable.

Please be informed: The Maryland Department of the Environment (MDE) is proposing to amend Regulation .01 under Radiation Management chapter COMAR 26.12.01 “Radiation Protection," and will hold a public comment period. 
The purpose of this action is to amend COMAR, Incorporation by Reference, to incorporate Supplement 34. Miscellaneous corrections to COMAR required by the Nuclear Regulatory Commission (NRC) to include:

    • Update COMAR, Remove section C.43 (h) on page G53-3
    • Correct the phrase from ''master material license'' to ''master material licensee.'' In section G.50 (3) on page G15-1.
    • Correct the title ''American Council on Pharmaceutical Education (ACPE)'' to: ''Accreditation Council for Pharmacy Education (ACPE) (Previously named the American Council on Pharmaceutical Education).''In section G.55 (a)(1) on page G17.
    • Correct the phrase “or a permit issued by a Commission master material license of broad scope on or before October 24, 2005," to “or a permit issued in accordance with an NRC master material broad scope license on or before October 24, 2005." In section G.57 (b)(2) on page G19-1.

Attached is a redline/strikeout version of the proposed supplement, available at the link below:
Redline Stikeout Draft Supplement 34.​​

The full text of the proposed regulatory amendments will appear in the Maryland Register,  on April 19, 2024. 

Notice of the public comment period is also available on the Maryland Department of the Environment's website at the following address:

Deadline for Comments: May 20, 2024, by 5:00 pm. 
Comments may be mailed or emailed to the address below. Comments may be as detailed as necessary. For more information or to submit comments, please contact:

Shannon Page
Division Chief, Radiological Health Program
Air and Radiation Administration
Maryland Department of the Environment
1800 Washington Boulevard, Suite 750
Baltimore, Maryland 21230

COMAR 26.12.02 and 26.12.03

Additional radiation control regulations include COMAR 26.12.02 and 26.12.03. COMAR 26.12.02, Inspection and Certification, includes requirements for State Certification of Radiation Machines, Licensing of Inspectors, and Inspection Procedures. COMAR 26.12.03, State Radiation Control Fund, includes required fees, a fee schedule, and the Consumer Price Index adjustment. A link to the official COMAR text of these regulations may be found below under Additional Links.

Contact Info

For additional information contact:

Ms. Shannon Page (Radiation Machines Division) at 410-537-3193 or email

Mr. Atnatiwos Meshesha (Radioactive Materials Division) at 410-537-3300 or email​

Additional Links



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