The NFPA 1 Fire Code (2024 Edition) is incorporated by reference, except for the amendments in Regulation .09 of this chapter and the following amendments:

1. A. Delete Section 1.11. (See COMAR 29.06.02)
2. B. Delete Section 1.12.
3. C. Amend Subsection 1.13.1 to add the following Paragraph: 1.13.1.1 Permits, certificates, notices, approvals, or orders required by this code shall be governed by the policies and procedures of the AHJ.
4. D. Amend Paragraph 1.13.6.13 to replace “Permits shall” with “Permits may”.
5. E. Amend Subsection 1.13.8 to replace “shall” with “may”.
6. F. Amend Subsection 1.14.2 to delete “Mandatory.” and replace “shall” with “may”.
7. G. Delete Paragraph 1.14.12.4.
8. H. Amend Subsection 2.1.1 and Paragraphs 2.1.1.1 and 2.1.1.2 to replace “Compliance” with “Where permitted by the AHJ, compliance”.
9. I. Amend Section 2.2 to delete the referenced publication NFPA 5000 Building Construction and Safety Code, 2024 edition. Wherever NFPA 5000 is referenced, other than for extracted text, substitute the building code adopted by the AHJ. Delete the referenced publication NFPA 150 Standard on Fire and Life Safety in Animal Housing Facilities, 2022 edition.
10. J. Amend Section 2.4 to delete the publication NFPA 5000 Building Construction Safety Code, 2024 edition. Wherever NFPA 5000 is referenced, other than for extracted text, substitute the building code adopted by the AHJ.
11. K. Amend Subsection 3.3.17 to add the following Paragraph: 3.3.17.12 Consumer Fireworks Retail Sales Area. The portion of a consumer fireworks retail sales facility or store, including the immediately adjacent aisles, where consumer fireworks are located for the purpose of retail display and sale to the public.
12. L. Amend Subsection 3.3.136 and Paragraph 3.3.136.1 to add “and as referenced in Public Safety Article, §10-101, Annotated Code of Maryland”.
13. M. Delete Subsection 3.3.175.
14. N. Amend Paragraph 3.3.203.6 to delete “more than 3 but”.
15. O. Amend Paragraphs 3.3.203.7 and 6.1.4.1 to delete “four or more”.
16. P. Amend Paragraph 3.3.203.25 and Subparagraph 3.3.203.25.1 to replace “three” with “five” and delete “, if any, accommodated in rented rooms”.
17. Q. Amend Paragraphs 3.3.203.28 and 6.1.9.1 to replace “four” with “six”.
18. R. Amend Paragraph 4.5.8.1 to delete “for compliance with the provisions of this Code”.
19. S. Amend Paragraph 4.5.8.3 to delete “by the Code”.
20. T. Amend Subparagraph 6.1.8.1.1 to replace “three” with “five” and delete “, if any, accommodated in rented rooms”.
21. U. Amend Subsection 10.1.2 to add “except as amended by COMAR 29.06.01.07, COMAR 29.06.01.08, and COMAR 29.06.01.09”.
22. V. Amend Paragraph 10.2.7.1 to replace “in Table 10.2.7.1” with “by the AHJ” and Table 10.2.7.1.
23. W. Amend Annex A to add the following new Paragraph: A.10.2.7.1 The frequency of fire prevention inspections of existing buildings should be based upon a risk assessment of these properties completed by the responsible AHJ. Considerations for this assessment should include, but not be limited to, the occupancy classification of the building and hazards associated with that classification; the number, location, and physical and mental capabilities of potential building occupants (especially self-evacuation abilities); construction design and maintenance of the property; fire protection features of the building; special hazards associated with activities or operations conducted within the building; available fire department suppression resources with special consideration to necessary special suppression operations; and resources available for fire code inspections and enforcement actions.
24. X. Amend Subsections 10.5.1 and 10.5.2 to replace “AHJ” with “AHJ or incident commander”.
25. Y. Amend Paragraph 10.2.7.1 to replace “in Table 10.2.7.1” with “by the AHJ” and Table 10.2.7.1.

26. Z. Amend Subsection 10.11.1 to add the following Subparagraph and Paragraph:

    1. 10.11.1.1.1 Subject to the approval of the AHJ, individual suites within structures and rear exterior entrances and/or access from service corridors shall be clearly identified.
    2. 10.11.1.9 Where required by the AHJ, symbols in compliance with NFPA 170 Standard for Fire Safety and Emergency Symbols shall be used.
27. AA. Amend Paragraph 10.11.1.1, 10.11.1.2, 10.11.1.3, 10.11.1.4, and 10.11.1.8 to replace “address numbers” with “premises identification”.
28. BB. Amend Paragraph 10.11.1.6 to delete existing wording and replace with “Where required by the AHJ, the assignment of addresses to buildings shall be in accordance with an approved method.”
29. CC. Delete Paragraph 10.11.1.7.
30. DD. Amend Subparagraph 10.14.12.2.6 to replace “any vehicles” with “any vehicles, buildings,”.
31. EE. Amend Paragraph 10.15.5.1 to replace “Portable” with “Unless otherwise approved by the AHJ, portable”.

32. FF. Amend Paragraph A.10.15.5.1 to add the following: For the purposes of reducing the distances between the operation and refueling of portable and vehicle-mounted generators and any building or enclosure opening, including windows, doors, and air intakes, one or more of the following conditions may be considered:

    1. (1) Nature of the occupancy of the building or enclosure.
    2. (2) Expected duration of generator use.
    3. (3) Use of certified low CO emission generators.
    4. (4) Actual available distance between the generator and building or enclosure openings.
    5. (5) Installation of approved CO detection within the building or enclosure.
    6. (6) Openness of building or enclosure perimeter walls and ceiling.
    7. (7) Physical barriers or other means to deflect generator exhaust from building or enclosure openings.
33. GG. Amend Section 10.16 to add the following Subsection: 10.16.6 The AHJ shall have the authority to require that outdoor storage of any combustible material be enclosed by an approved fence or other protective enclosure to prevent unauthorized access.
34. HH. Amend Subsection 10.16.1 to replace “10 ft (3m)” with “15 feet (4.6 meters)” and “property line” with “property line, building, or adjacent pile of combustible material”; and add the following: The separation distance shall be allowed to be increased where the AHJ determines that a higher hazard to the adjoining property exists.
35. II. Amend Subsection 10.16.5 to add “and shall not exceed 10,000 square feet in area”.
36. JJ. Amend Subsection 10.19.7 to replace “repaired” with “repaired on any balcony, under any overhanging portion, or”.
37. KK. Amend Subsection 10.21.1 to replace “more than five” with “one or more” and replace “10 ft (3 m)” with “15 feet (4.6 meters)”.
38. LL. Amend Subsection 10.21.4 Item (3) to replace “10 ft (3 m)” with “15 feet (4.6 meters)”.
39. MM. Amend Section 10.22 to replace “10.22.5” with “10.22.5, unless otherwise permitted by the AHJ”.

40. NN. Amend Section 11.1 to add the following Subsection:

    1. 11.1.9 Clearance. A clear space of not less than 30 inches (762 millimeters) in width, 36 inches (914 millimeters) in depth, and 78 inches (1981 millimeters) in height shall be provided in front of electrical service equipment. Where the electrical service equipment is wider than 30 inches (762 millimeters), the clear space shall not be less than the width of the equipment. No storage of any materials shall be located within the designated clear space. Exception: Where other specialized dimensions are required or permitted by NFPA 70.
41. OO. Amend Paragraph 11.1.5.6 to delete existing wording and replace with the following: Extension cords shall not be used as a substitute for permanent wiring.
42. PP. Amend Paragraph 11.1.7.3 to add the following Subparagraph: 11.1.7.3.2 Doors to electrical control panel rooms shall be marked with a plainly visible and legible sign stating ELECTRICAL ROOM or similar approved wording in contrasting letters not less than one inch (25 millimeters) high and not less than ¼ inch (6.4 millimeters) in stroke width.
43. QQ. Amend Paragraph 11.3.6.1 to add the following sentence: Keys for new elevators shall be cut to a uniform key code to comply with the Maryland State Elevator Code.
44. RR. Amend Subsection 11.9.1 to replace “approved by the fire department” with “approved by the AHJ”.

45. SS. Amend Paragraph 12.6.9.1 to add the following new Subparagraph: 12.6.9.1.2 The AHJ shall be permitted to:

    1. (1) Approve the placement of a natural cut or balled tree;
    2. (2) Limit the number of natural cut or balled trees displayed; and
    3. (3) Order the removal of any tree if the tree poses a hazard to life or safety.
46. TT. Amend Subparagraph 12.6.9.1.1 to replace “Christmas” with “Unless otherwise approved by the AHJ, Christmas”.
47. UU. Amend Paragraph 12.6.9.5 to add the following Subparagraph: 12.6.9.5.3 Combustible artificial decorative vegetation shall be tested by a laboratory recognized by the Office of the State Fire Marshal.
48. VV. Amend Subparagraph 12.6.9.6.1 to replace ½” (13 mm)” with “2 inches (50 millimeters)” and add the following sentence: “A natural cut tree shall not exceed 10 feet (3 meters) in height, excluding the tree stand.”
49. WW. Amend Section 13.1 to add the following Subsection: 13.1.14 Appearance of Equipment. The AHJ shall be permitted to prohibit any device that has the physical appearance of a life safety or fire protection function but does not perform that life safety or fire protection function.
50. XX. Amend Paragraph 13.1.3.1 to replace “by Chapters 11 through 43” with “by the AHJ and Chapters 11 through 43”.
51. YY. Amend Paragraph 13.1.3.2 to replace “by 9.3.5” with “by the AHJ, 9.3.5”.
52. ZZ. Amend Paragraph 13.3.1.2 to add the following Subparagraph: 13.3.1.2.1 For new ceiling installations, drop-out ceilings as referenced in NFPA 13, Subsection 9.3.11 and NFPA 13R, Section 6.15, shall be prohibited.
53. AAA. Amend Subparagraph 13.3.2.5.1 replace “The following assembly occupancies” with “The following assembly occupancies having an occupant load of 100 or more persons, or 5,000 or more square feet in area, or located on a floor other than the level of exit discharge”.

54. BBB. Delete Subparagraph 13.3.2.24.2 and replace with the following:

    13.3.2.24.2* Existing high-rise buildings, other than those meeting 13.3.2.24.2.1 or 13.3.2.24.2.2, shall be protected throughout by an approved automatic sprinkler system in accordance with this chapter and 13.3.2.24.2.3 through 13.3.2.24.2.5.

    1. 13.3.2.24.2.1 An automatic sprinkler system shall not be required where every dwelling unit has exterior exit access in accordance with 14.10.3.
    2. 13.3.2.24.2.2 An automatic sprinkler system shall not be required in buildings that have a previously approved and implemented engineered life safety system complying with 13.3.2.24.2.2.1 and 13.3.2.24.2.2.2.

    3. 13.3.2.24.2.2.1 The engineered life safety system shall have been developed by a registered professional engineer experienced in fire and life safety system design, approved by the authority having jurisdiction, and inspected for compliance by the authority having jurisdiction, and shall include any or all of the following:

       1. (1) Partial automatic sprinkler protection
       2. (2) Smoke detection systems
       3. (3) Smoke control systems
       4. (4) Compartmentation
       5. (5) Other approved systems
    4. 13.3.2.24.2.2.2 The engineered life safety system shall be maintained in accordance with the approved design documents and applicable standard.
    5. 13.3.2.24.2.3 Each building owner shall, within 180 days of receiving notice, file an intent to comply with this regulation with the AHJ for approval.
    6. 13.3.2.24.2.4 The AHJ shall review and respond to the intent-to-comply submittal within 60 days of receipt. 13.3.2.24.2.5* The entire building shall be required to be protected by an approved automatic sprinkler system within 12 years of the date of the original violation notice issued by the fire authority having jurisdiction.

    7. 13.3.2.24.2.6 Public Disclosure Signage. In high-rise buildings that are not protected throughout by an approved automatic sprinkler system, signage shall be posted complying with 13.3.2.24.2.6(A) through 13.3.2.24.2.6(D).

       1. (A) Signage shall be posted at all main building entrances as approved by the AHJ.
       2. (B) The lettering on the sign shall be at least 1 inch (25 millimeters) high.
       3. (C) The lettering shall be placed on a contrasting background.
       4. (D) The wording shall state as follows: “WARNING: THIS HIGH-RISE BUILDING IS NOT PROTECTED THROUGHOUT WITH AN AUTOMATIC FIRE SPRINKLER SYSTEM”.
55. CCC. Amend A.13.3.2.24.2.3 to replace “A.13.3.2.24.2.3” with “A.13.3.2.24.2.5”.
56. DDD. Amend Subparagraph 13.3.2.25.5 to delete existing wording and replace with the following: An automatic sprinkler system shall be installed throughout all mini-storage building fire areas greater than 2500 feet2(232 meters2) and where any of the individual storage units are separated by less than a 1-hour fire resistance-rated barrier. Fire areas shall be defined by approved fire barriers having a fire resistance rating of not less than 3-hours.[5000:30.3.5.4]

57. EEE. Amend Sub-subparagraph 13.3.2.27.1.1 to add the following:

    Automatic sprinkler protection is not required if all of the following conditions are met:

    1. (1) The total number of occupants in the occupancy in which the day care center is located is not more than 300 persons.
    2. (2) All rooms used for day care are located on the level of exit discharge;
    3. (3) All rooms used for day care have at least one exterior exit door at grade level; and
    4. (4) The occupancy in which the day care center is located does not exceed 12,000 sq. feet in area.
58. FFF. Amend Paragraphs 13.3.3.1 and 13.3.3.2 to delete “installed in accordance with this Code”.
59. GGG. Amend Subsection 13.4.1 to add the following Subparagraph: 13.4.1.1.1 No fire pump component, including the pump, driver, or controller, shall be permitted to be installed in below-ground vaults or pits unless otherwise approved by the AHJ.
60. HHH. Amend Subsection 13.6.1.2 to add “, unless otherwise permitted by the AHJ.”
61. III. Amend Sub-subparagraph 13.6.4.1.2.1 to replace “certified” with “licensed as required by the AHJ”.
62. JJJ. Delete Sub-subparagraphs 13.6.4.1.2.1.1, 13.6.4.1.2.1.2, 13.6.4.1.2.1.3, 13.6.4.1.2.1.4, 13.6.4.1.2.1.5, 13.6.4.1.2.1.6.
63. KKK. Amend Sub-subparagraph 13.6.4.1.2.3 to replace “certified” with “licensed”.
64. LLL. Amend Subparagraph 13.7.1.7.6 to add the following: This paragraph does not permit the omission of manual fire alarm boxes in accordance with other provisions of this Subsection unless specifically permitted by NFPA 101 Chapters 11 through 43.
65. MMM. Amend Subparagraph 13.7.1.15.1 to replace “another section of this Code” with “the AHJ and another section of this Code”.
66. NNN. Amend Sub-subparagraph 13.7.2.5.6.4 to add the following: For compliance with NFPA 101, Paragraph 43.7.2.1(2), approved battery-powered smoke alarms, rather than house electrical service-powered smoke alarms shall be permitted where the facility has testing, maintenance, and smoke alarm replacement programs that ensure reliability of power to the smoke alarms.
67. OOO. Amend Sub-subparagraph 13.7.2.6.6.5 to delete “existing” and replace “battery” with “smoke alarm”.
68. PPP. Amend Sub-subparagraph 13.7.2.22.8.1 to delete “13.7.2.22.8.2 and”.
69. QQQ. Delete Sub-subparagraph 13.7.2.22.8.2.
70. RRR. Amend Sub-subparagraphs 13.7.2.28.1.2 and 13.7.2.28.1.3 to replace “Storage occupancies” with “Storage occupancies less than three stories”.

71. SSS. Amend Paragraph 14.4.2.1 to add the following subparagraph:

    1. 14.4.2.1.1 Trash or recyclable materials awaiting scheduled collection shall not be placed in exits, exit access corridors, or on egress balconies.
72. TTT. Amend Subparagraphs 14.5.2.3.7 and 14.5.2.3.8 to add the following sentence: “The locking device shall be of a type that is readily distinguishable as locked.”
73. UUU. Amend Subparagraph 14.5.3.4.1 to replace “in Chapters 11 through 43” with “by the AHJ and in Chapters 11 through 43”.
74. VVV. Amend Subparagraph 14.5.3.5.1 to delete “required to be”.
75. WWW. Amend Subparagraph 14.5.3.5.4 to delete the word “Required”.
76. XXX. Amend Subsection 14.5.8 to delete “14.5.8.1 or”.
77. YYY. Delete Paragraph 14.5.8.1.
78. ZZZ. Amend Paragraph 14.5.10.1 to replace “by Chapters 11 through 43” with “by the AHJ or Chapters 11 through 43”.
79. AAAA. Amend Paragraph 14.13.1.2 to replace “only” in the first sentence with “, but not be limited to,”.
80. BBBB. Amend Subparagraph 18.2.3.2.1 to replace “exterior door” with “exterior door acceptable to the AHJ”.
81. CCCC. Amend Paragraph 18.2.3.4 to replace the word “shall” with “to” and replace the word “newly” with “the AHJ shall be permitted to require newly”.
82. DDDD. Amend Subparagraph 20.1.5.8.3 to replace “prior” to “within 10 minutes prior”.

83. EEEE. Amend Subparagraph 20.2.4.2.3 to delete existing wording and replace with the following: Fire emergency egress drills shall be conducted as follows:

    1. (1) Not less than one fire emergency egress drill shall be conducted every month the facility is in session, unless the following criteria are met:

       1. (a) In climates where the weather is severe, the monthly fire emergency egress drills shall be permitted to be deferred; and

       2. (b) In educational occupancies which are:

          1. (i) Fully protected by an automatic sprinkler system, the total number of annual fire emergency egress drills shall be five, with a least two of the required drills conducted in the first four months of the school year; or
          2. (ii) Not fully protected by an automatic sprinkler system, the total number of annual fire emergency egress drills shall be eight, with at least three of the required drills conducted in the first four months of the school year.
    2. (2) All occupants of the building shall participate in the fire emergency egress drill.
    3. (3) One fire emergency egress drill, other than for educational occupancies that are open on a year-round basis, shall be required within the first 30 days of operation.
84. FFFF. Amend Subparagraph 20.3.4.1.1 and 20.3.4.1.2 to delete “more than 3, but” and the “,” after “12”.
85. GGGG. Amend Paragraph 25.2.2.1 to add “or other approved testing standard approved by the State Fire Marshal”.

86. HHHH. Amend Subsection 26.1.6 to add the following Paragraphs:

    1. 26.1.6.2 When requested by the AHJ, a hazard assessment shall be conducted by a technically qualified person acceptable to the AHJ.
    2. 26.1.6.3 When requested by the AHJ, a list of hazardous materials used in each laboratory shall be provided. The list shall specify the chemical name, quantity and hazard class.
    3. 26.1.6.4 New laboratories or laboratories where the NFPA 45 laboratory hazard classification changes shall post an information placard near the main entrance to the laboratory. The placard shall state the building name or address, room number, NFPA 45 laboratory hazard classification, edition of NFPA 45, maximum allowable quantities of flammable liquids both inside a storage cabinet and open use, and maximum quantities of flammable gases permitted within the laboratory.
87. IIII. Amend Paragraph 32.9.3.7 to replace “made” with “made within 10 minutes prior to the start of each program”.
88. JJJJ. Amend 34.1.3 to replace “An approved storage” with “Where required by the AHJ, an approved storage”.

89. KKKK. Amend Section 34.6 to add the following new Subsection and Paragraphs:

    1. 34.6.7 Standpipe systems shall be installed in all storage buildings having an area of 300,000 square feet or more.
    2. 34.6.7.1 Standpipe systems shall comply with Section 13.2 and NFPA 14.

    3. 34.6.7.2 Class I hose connections shall be provided at each of the following locations:

       1. (1) In each exit passageway at the entrance from the storage area into the passageway;
       2. (2) Within every required exit stairwell;
       3. (3) At other locations such that all points of the storage area floor are within 200 feet. of a hose connection, unless otherwise required by the AHJ.
90. LLLL. Delete Chapter 35 Animal Housing Facilities.

91. MMMM. Amend Subsection 42.7.5 to add the following Paragraphs:

    1. 42.7.5.7 Management/owner officials or employees shall conduct daily site visits to ensure that all equipment is operating properly.
    2. 42.7.5.8 Regular equipment inspection and maintenance at the unattended self-service facility shall be conducted.

    3. 42.7.5.9 Fuel dispensing equipment shall comply with one of the following:

       1. (1) The amount of fuel being dispensed is limited in quantity by preprogrammed card; or
       2. (2) Dispensing devices shall be programmed or set to limit uninterrupted fuel delivery of not more than 25 gallons and shall require a manual action to resume continued delivery.

92. NNNN. Amend Paragraph 42.7.5.5 to add the following: The following information shall be conspicuously posted in this area:

    1. (1) The exact address of the unattended self-service facility.
    2. (2) The telephone number of the owner or operator of the unattended self-service facility.

93. OOOO. Amend Subsection 50.8.1 to add the following Paragraphs, Subparagraphs, and Sub-subparagraphs:

    1. 50.8.1.7 Commercial Outdoor Cooking Operations. These requirements apply to commercial outdoor cooking operations such as those that typically take place under a canopy or tent-type structure at fairs, festivals, and carnivals. This includes, but is not limited to, deep frying, sauteing, and grilling operations.
    2. 50.8.1.7.1 LP Gas Fuel Requirements.
    3. 50.8.1.7.1.1 LP gas tank size shall be limited to 60 pounds. The total amount of LP gas on site shall not exceed 60 pounds for each appliance that is rated not more than 80,000 btu/hour and 120 pounds for each appliance rated more than 80,000 btu/hour.
    4. 50.8.1.7.1.2 Tanks shall be maintained in good physical condition and shall have a valid hydrostatic date stamp.
    5. 50.8.1.7.1.3 Tanks shall be secured in their upright position with a chain, strap, or other approved method that prevents the tank from tipping over.
    6. 50.8.1.7.1.4 Tanks shall be located so that they are not accessible to the public. LP gas tanks shall be located at least 5 feet from any cooking or heating equipment or any open flame device.
    7. 50.8.1.7.1.5 All LP gas equipment shall be properly maintained and comply with the requirements of NFPA 58.
    8. 50.8.1.7.1.6 Regulators. Single-stage regulators may not supply equipment that is rated more than 100,000 btu/hour rating. Two-stage regulators shall be used with equipment that is rated more than 100,000 btu/hour.
    9. 50.8.1.7.2 General Safety Requirements.
    10. 50.8.1.7.2.1 All electrical cords shall be maintained in a safe condition and shall be secured to prevent damage.
    11. 50.8.1.7.2.2 Movable cooking equipment shall have wheels removed or shall be placed on blocks or otherwise secured to prevent movement of the appliance during operation.
    12. 50.8.1.7.2.3 Portable fire extinguishers shall be provided in accordance with Section 13.6, and shall be specifically listed for such use.
    13. 50.8.1.8 There shall be no obstructions or impediments to immediate escape from vehicles or other mobile units used for cooking operations.
    14. 50.8.1.9 Seating for the public shall not be located within any mobile or temporary cooking vehicle.

94. PPPP. Delete Subsection 50.8.3 and replace with the following:

    1. 50.8.3 Tent and Canopy Requirements
    2. 50.8.3.1 Temporary cooking operations conducted in tents and under canopies shall comply with NFPA 102 and Chapter 25.
    3. 50.8.3.2 All tent and canopy material shall comply with the flame resistance requirements of Section 25.2.2.
    4. 50.8.3.3 Tents or canopies where cooking equipment not protected in accordance with NFPA 96 is located shall not be occupied by the public.
    5. 50.8.3.4 Tents or canopies where cooking equipment not protected in accordance with NFPA 96 is located shall be separated from other tents, canopies, structures, or vehicles by a minimum of 10 feet (3050 millimeters) unless otherwise approved by the AHJ.
95. QQQQ. Amend Subparagraph 50.8.8.3.2 to replace “not be transported or stored inside the vehicle” with “be secured in an upright position during transport and storage”.

Authority: Public Safety Article, §§6-206 and 6-501, Annotated Code of Maryland

Effective date: July 21, 1972

Regulations .01B, .13A, .15B, G, .16B, .18A, B, .22B, .23A—C, .26B, .29B—D, .33, .35B amended effective October 7, 1977 (4:21 Md. R. 1604)

Regulations .04—.14, .16—.35, and .41 amended effective August 30, 1982 (9:17 Md. R. 1709)

Regulation .14D adopted effective July 1, 1967

Regulations .15G, .16C, .18C, .22A, .29B, and .35B, E, F amended as an emergency provision effective February 23, 1978 (5:5 Md. R. 332); adopted permanently effective June 2, 1978 (5:11 Md. R. 885)

Regulation .16A amended effective April 9, 1984 (11:7 Md. R. 628)

Regulations .16B, .18A, E, .23, .26B, .29D amended effective May 14, 1975 (2:10 Md. R. 759)

Regulation .16B amended effective April 18, 1980 (7:8 Md. R. 772)

Regulation .23B amended effective August 22, 1980 (7:17 Md. R. 1672)

Regulation .26 amended effective December 7, 1981 (8:24 Md. R. 1936)

Regulation .30E adopted effective October 5, 1979 (6:20 Md. R. 1629); September 19, 1980 (7:19 Md. R. 1808)

Regulation .33 amended effective November 21, 1983 (10:23 Md. R. 2064)

Regulation .34 amended effective January 21, 1976 (3:2 Md. R. 87) and November 4, 1977 (4:23 Md. R. 1735)

Regulation .36 adopted effective April 27, 1977 (4:9 Md. R. 1719)

Regulation .36A, C amended effective October 7, 1977 (4:21 Md. R. 1604)

Regulation .37 adopted effective February 26, 1979 (6:4 Md. R. 227); amended effective October 5, 1979 (6:20 Md. R. 1629)

Regulation .37 (Cellulose and Foam Insulation) adopted as an emergency provision effective January 1, 1979 (6:1 Md. R. 15); emergency status withdrawn by AELR Committee for §B of this regulation effective February 1, 1979 (6:4 Md. R. 275); emergency status expired May 12, 1979

Regulation .38 adopted effective October 5, 1979 (6:20 Md. R. 1629)

Regulation .39 adopted effective October 31, 1980 (7:22 Md. R. 2074)

Regulation .40 adopted effective July 20, 1981 (8:14 Md. R. 1228)

Regulation .41 adopted effective October 12, 1981 (8:20 Md. R. 1636)

Regulation .42 adopted effective January 17, 1983 (10:1 Md. R. 32)

Chapter revised effective May 6, 1985 (12:9 Md. R. 812)

Regulation .06A amended effective July 28, 1986 (13:15 Md. R. 1735); July 24, 1989 (16:14 Md. R. 1568)

Regulation .06O amended effective October 5, 1987 (14:20 Md. R. 2143)

Regulation .06R adopted effective October 1, 1985 (12:19 Md. R. 1849)

Regulation .06S adopted effective March 7, 1988 (15:5 Md. R. 622)

Regulation .07B amended effective January 23, 1989 (16:1 Md. R. 72)

Chapter revised effective May 11, 1992 (19:9 Md. R. 879)

Regulation .09B amended effective November 22, 1993 (20:23 Md. R. 1805)

Regulation .10 adopted effective November 22, 1993 (20:23 Md. R. 1805)

Chapter revised effective December 4, 1995 (22:24 Md. R. 1897)

COMAR 12.03.01 repealed effective January 14, 1999 (26:1 Md. R. 25)

Regulations .01—.22 adopted effective January 14, 1999 (26:1 Md. R. 25)

Regulations .01—.22 repealed effective August 6, 2001 (28:15 Md. R. 1400)

Regulations .01—.17 adopted effective August 6, 2001 (28:15 Md. R. 1400)

Chapter revised effective August 1, 2004 (31:12 Md. R. 914)

Chapter revised effective January 1, 2007 (33:24 Md. R. 1907)

Regulation .02B amended effective January 1, 2010 (36:25 Md. R. 1956); January 1, 2013 (39:23 Md. R. 1533); January 1, 2016 (42:23 Md. R. 1436); October 7, 2019 (46:20 Md. R. 847); June 23, 2025 (52:12 Md. R. 599)

Regulation .03B repealed effective January 1, 2010 (36:25 Md. R. 1956)

Regulation .04D amended effective January 1, 2010 (36:25 Md. R. 1956)

Regulation .05B amended effective January 1, 2010 (36:25 Md. R. 1956); June 23, 2025 (52:12 Md. R. 599)

Regulation .06 amended effective January 1, 2016 (42:23 Md. R. 1436)

Regulation .06B amended effective January 1, 2010 (36:25 Md. R. 1956); October 7, 2019 (46:20 Md. R. 847); June 23, 2025 (52:12 Md. R. 599)

Regulation .06C amended effective January 1, 2010 (36:25 Md. R. 1956); January 1, 2013 (39:23 Md. R. 1533)

Regulation .07 amended effective January 1, 2010 (36:25 Md. R. 1956); January 1, 2013 (39:23 Md. R. 1533); January 1, 2016 (42:23 Md. R. 1436); October 7, 2019 (46:20 Md. R. 847); June 23, 2025 (52:12 Md. R. 599)

Regulation .08 amended effective January 1, 2010 (36:25 Md. R. 1956); January 1, 2013 (39:23 Md. R. 533); January 1, 2016 (42:23 Md. R. 1436); October 7, 2019 (46:20 Md. R. 847); June 23, 2025 (52:12 Md. R. 599)

Regulation .09 amended effective January 1, 2010 (36:25 Md. R. 1956); January 1, 2013 (39:23 Md. R. 533); January 1, 2016 (42:23 Md. R. 1436); October 7, 2019 (46:20 Md. R. 847); June 23, 2025 (52:12 Md. R. 599)

Regulation .09E amended as an emergency provision effective February 7, 2020 (47:10 Md. R. 514); emergency provision expired effective August 3, 2020

Regulation .09E amended effective August 10, 2020 (47:16 Md. R. 738)

Regulation .10 amended effective January 1, 2013 (39:23 1533); October 7, 2019 (46:20 Md. R. 847)

Regulation .11 amended effective January 1, 2010 (36:25 Md. R. 1956)

Regulation .11-1 adopted effective January 1, 2010 (36:25 Md. R. 1956)

Regulation .13 repealed effective January 1, 2016 (42:23 Md. R. 1436)

Regulation .14A amended effective January 1, 2010 (36:25 Md. R. 1956); January 1, 2013 (39:23 Md. R. 1533); January 1, 2016 (42:23 Md. R. 1436); October 7, 2019 (46:20 Md. R. 847); June 23, 2025 (52:12 Md. R. 599)