1. A. The following materials are not solid wastes for the purpose of this chapter:

   1. (1) Domestic sewage, as defined in §B of this regulation, and, except as prohibited by COMAR 26.13.10.33 and Clean Water Act requirements at 40 CFR §403.5(b), any mixture of domestic sewage and other wastes that passes through a sewer system to a publicly owned treatment works for treatment;
   2. (2) Industrial wastewater discharges that are point source discharges permitted pursuant to §402 of the Clean Water Act, as amended, or permitted pursuant to Environment Article, §§9-324—9-332, Annotated Code of Maryland;
   3. (3) Irrigation return flows;
   4. (4) Materials subjected to in situ mining techniques which are not removed from the ground as part of the extraction process;
   5. (5) Black liquor or other pulping liquors that are reclaimed in a pulping liquor recovery furnace and then reused in the pulping process, unless it is a material accumulated speculatively as defined in Regulation .01D of this chapter;
   6. (6) Spent sulfuric acid used to produce virgin sulfuric acid, unless it is a material accumulated speculatively as defined in Regulation .01D of this chapter;

   7. (7) Secondary materials that are reclaimed and returned to the original process or processes in which they were generated where they are reused in the production process if:

      1. (a) Only tank storage is involved, and the entire process through completion of reclamation is closed by being entirely connected with pipes or other comparable enclosed means of conveyance;
      2. (b) Reclamation does not involve controlled flame combustion, such as occurs in boilers, industrial furnaces, or incinerators;
      3. (c) The secondary materials are never accumulated in the tanks for over 12 months without being reclaimed; and
      4. (d) The reclaimed material is neither used to produce a fuel, nor used to produce products that are used in a manner constituting disposal;

   8. (8) EPA hazardous waste numbers K060, K087, K141, K142, K143, K144, K145, K147, and K148, and any wastes from the coke by-products processes that are hazardous only because they exhibit the toxicity characteristic (TC) specified in Regulation .14 of this chapter if:

      1. (a) Subsequent to generation, these materials are recycled to coke ovens or to the tar recovery process as a feedstock to produce coal tar, or are mixed with coal tar before the tar's sale or refining; and
      2. (b) There is no land disposal of the wastes from the point at which they are generated to the point at which they are mixed with coal tar, or the point at which they are recycled to coke ovens, tar recovery processes, or tar refining processes;

   9. (9) The following wastes from wood preserving, as qualified by §C of this regulation:

      1. (a) Spent wood-preserving solutions that have been reclaimed and are reused for their original intended purpose;
      2. (b) Wastewaters from the wood-preserving process that have been reclaimed and are reused to treat wood; and

      3. (c) Before reuse, the wood-preserving wastewaters and spent wood-preserving solutions described in §A(9)(a) and (b) of this regulation if they meet all of the following conditions:

         1. (i) The wood-preserving wastewaters and spent wood-preserving solutions are generated from processes that use waterborne preservatives;
         2. (ii) The wood-preserving wastewaters and spent wood-preserving solutions are reused on-site in the production process for their originally intended purpose at plants using waterborne preservatives in the production process;
         3. (iii) Before reuse, the wastewaters and spent wood-preserving solutions are managed to prevent release to land and ground water;
         4. (iv) Any unit used to manage wastewaters or spent wood-preserving solutions or both before reuse can be evaluated visually or by other means to verify that the unit is capable of containing and preventing these materials from being released to the environment;
         5. (v) Any drip pad used to manage the wastewaters, spent wood-preserving solutions, or both before reuse is in compliance with the standards of COMAR 26.13.06.26, regardless of whether the plant generates a total of less than 100 kilograms per month of hazardous waste;
         6. (vi) Before operating under the exclusion provided by §A(9)(c) of this regulation, the plant owner or operator submits a one-time notification to the Secretary stating that the plant intends to claim the exclusion and giving the date on which the plant intends to begin operating under the exclusion;
         7. (vii) The plant owner or operator includes, in the notification required by §A(9)(c)(vi) of this regulation, the following statement: “I have read the applicable regulation establishing an exclusion for wood-preserving wastewaters and spent wood-preserving solutions and understand it requires me to comply at all times with the conditions set out in the regulation.”; and
         8. (viii) The plant maintains a copy of the notification required by §A(9)(c)(vi) of this regulation in its on-site records for a period of not less than 3 years from the date specified in the notification;

   10. (10) Nonwastewater splash condenser dross residue from the treatment of K061 in high temperature metals recovery units, if this material is:

       1. (a) Shipped in drums if it is shipped; and
       2. (b) Not land-disposed before recovery;

   11. (11) Excluded scrap metal being recycled, including the following as defined and qualified in Regulation .01D of this chapter:

       1. (a) Processed scrap metal;
       2. (b) Unprocessed home scrap metal; and
       3. (c) Unprocessed prompt scrap metal;

   12. (12) Shredded circuit boards being recycled if they are:

       1. (a) Stored in containers sufficient to prevent a release to the environment before recovery; and
       2. (b) Free of mercury switches, mercury relays, nickel-cadmium batteries, and lithium batteries;

   13. (13) Spent caustic solutions from petroleum refining liquid treating processes used as a feedstock to produce cresylic acid or naphthenic acid if the spent caustic solutions are not:

       1. (a) Placed on the land; or
       2. (b) Material accumulated speculatively as defined in Regulation .01D of this chapter;
   14. (14) Condensates derived from the overhead gases from kraft mill steam strippers that are used to comply with 40 CFR §63.446(e) if the condensates are combusted at the mill at which the condensates are generated;

   15. (15) Oil-bearing hazardous secondary materials, that is, sludges, byproducts, or spent materials, that are generated at a petroleum refinery (SIC code 2911), when:

       1. (a) The secondary materials are inserted into the petroleum refining process (SIC code 2911), including, but not limited to, distillation, catalytic cracking, fractionation, or thermal cracking units, that is, “cokers”;

       2. (b) The material, before it is inserted into the petroleum refining process:

          1. (i) Is not placed on the land; and
          2. (ii) Is not a material accumulated speculatively as defined in Regulation .01D of this chapter;
       3. (c) If the material is inserted into a thermal cracking unit, the coke product does not exhibit a characteristic of hazardous waste defined in Regulations .10—.14 of this chapter; and

       4. (d) The oil-bearing secondary hazardous material is either:

          1. (i) Inserted into the same petroleum refinery where it is generated; or
          2. (ii) Sent directly to another petroleum refinery;
       5. (e) Except as provided in §A(16) of this regulation, the oil-bearing hazardous secondary material was not generated elsewhere in the petroleum industry, that is, from a source other than a petroleum refinery; and
       6. (f) Residuals generated from recycling or processing oil-bearing hazardous secondary materials excluded under this provision that, as generated, would have otherwise met a listing under Regulations .15—.19 of this chapter are designated as listed wastes with EPA hazardous waste number F037 if disposed of or intended for disposal;

   16. (16) Recovered oil that is recycled by being inserted into the petroleum refining process, as described in §A(15) of this regulation, subject to the following:

       1. (a) For the purposes of this section, “recovered oil” means oil that has been reclaimed from wastewater or other secondary materials generated from normal petroleum industry practices, including refining, exploration and production, bulk storage, and transportation incident to these activities (SIC codes 1311, 1321, 1381, 1382, 1389, 2911, 4612, 4613, 4922, 4923, 4789, 5171, and 5172);

       2. (b) For the purposes of this section, “recovered oil” does not mean:

          1. (i) Oil-bearing hazardous wastes listed in Regulations .16—.19 of this chapter, except that oil recovered from these wastes may be considered recovered oil; or
          2. (ii) Used oil as defined in COMAR 26.13.01.03B; and
       3. (c) The conditions of §A(15)(b), (c), and (f) of this regulation are met;

   17. (17) Petrochemical recovered oil from an associated organic chemical manufacturing facility that is to be inserted into the petroleum refining process (SIC code 2911) along with normal petroleum refining process streams, subject to the following:

       1. (a) For the purposes of this section, “associated organic chemical manufacturing facility” means a facility:

          1. (i) Where the primary SIC code is 2869, but where operations may also include SIC codes 2821, 2822, and 2865;
          2. (ii) That is physically co-located with a petroleum refinery; and
          3. (iii) That receives hydrocarbon feedstocks from the refinery to which the recovered oil is being sent for recycling;

       2. (b) For the purposes of this section, “petrochemical recovered oil” means oil that has been:

          1. (i) Reclaimed from secondary materials, that is, sludges, byproducts, or spent materials, including wastewater, from normal organic chemical manufacturing operations; or
          2. (ii) Recovered from organic chemical manufacturing processes;
       3. (c) The oil would otherwise be regulated as a hazardous waste only because it exhibits the characteristic of ignitability of Regulation .11 of this chapter, the toxicity characteristic for benzene as defined in Regulation .14 of this chapter, or both; and

       4. (d) Before the oil generated by the organic chemical manufacturing facility is recycled into the petroleum refining process, it is not:

          1. (i) Placed on the land; or
          2. (ii) A material accumulated speculatively as defined in Regulation .01D of this chapter;

   18. (18) A used cathode ray tube (CRT) under the following conditions:

       1. (a) A used, intact CRT, as defined in COMAR 26.13.01.03B, that is within the United States that:

          1. (i) Has not been disposed; and
          2. (ii) Is not material accumulated speculatively, as defined in Regulation .01D of this chapter, by a CRT collector or a facility engaged in CRT processing;
       2. (b) A used, intact CRT that is being exported for recycling, if it is managed in accordance with the requirements of Regulation .19-8A of this chapter;
       3. (c) A used, broken CRT as defined in COMAR 26.13.01.03B, if it is managed in accordance with the requirements of Regulations .19-6 and .19-7 of this chapter; and
       4. (d) Glass removed from a CRT if it is managed in accordance with the requirements of Regulation .19-6D of this chapter; and

   19. (19) Beginning at the point of generation, a solvent-contaminated wipe that is sent for cleaning and reuse, if the following conditions are met:

       1. (a) The wipe:

          1. (i) Contains no free liquids, as determined by Method 9095B, the Paint Filter Liquids Test, included in “Test Methods for Evaluating Solid Waste, Physical/Chemical Methods”, EPA SW-846, which is incorporated by reference at COMAR 26.13.01.05A(4);
          2. (ii) Contains no hazardous waste listed in Regulations .15—.19 of this chapter other than solvents; and
          3. (iii) If it exhibits any of the characteristics of toxicity, corrosivity, or reactivity, does so only as a result of contamination by solvent contaminants, and not as a result of contamination by non-solvent contaminants;
       2. (b) While being accumulated, stored, and transported, the wipe is contained in a nonleaking, closed container that is labeled “Excluded Solvent-Contaminated Wipes”;

       3. (c) The container in which the wipe is placed:

          1. (i) Is able to contain any free liquid that is expressed from materials in the container; and
          2. (ii) Is kept closed except when it is necessary to open the container to add material, remove material, or examine the contents of the container, with closure of the container achieved by complete contact between a fitted lid of the container and the container rim;

       4. (d) Each container that is being used to accumulate solvent contaminated wipes is marked with the earlier of the following dates as the accumulation start-date:

          1. (i) The date on which the first solvent-contaminated wipe was placed in the container; or
          2. (ii) If a wipe is transferred to the container from another container, the accumulation start-date associated with the container from which the wipe is being transferred;
       5. (e) The wipe is sent for cleaning not later than 180 days after the accumulation start date associated with the container in which the wipe is being accumulated;

       6. (f) The container in which the wipe is being accumulated is sealed, with all lids properly and securely affixed to the container, and all openings tightly bound or closed sufficiently to prevent leaks and emissions, if:

          1. (i) The container is full;
          2. (ii) Solvent-contaminated wipes that will be cleaned for reuse are no longer being generated; or
          3. (iii) The container is being transported;

       7. (g) At the point of being sent for cleaning on site, or at the point of being transported off site for cleaning:

          1. (i) The wipe continues to contain no free liquids, as specified in §A(19)(a) of this regulation; and
          2. (ii) The container in which the wipe has been placed contains no free liquid;
       8. (h) The generator manages free liquids removed from solvent-contaminated wipes, and free liquid removed from a container in which a solvent contaminated wipe is being accumulated in accordance with applicable requirements of COMAR 26.13.01—26.13.10;

       9. (i) The generator maintains the following documentation at the generator’s site:

          1. (i) The name and address of the laundry or dry cleaner that is receiving the solvent-contaminated wipes;
          2. (ii) Documentation that the 180-day accumulation time limit of §A(19)(e) of this regulation is being met; and
          3. (iii) A description of the process that the generator is using to ensure that the solvent-contaminated wipes contain no free liquids at the point of being laundered or dry cleaned on site, or at the point of being transported off site for laundering or dry cleaning; and
       10. (j) The solvent-contaminated wipe is sent to a laundry or dry cleaner whose discharge, if any, is regulated under §§301 and 402 of the Clean Water Act, or §307 of the Clean Water Act.

   Agency Note: In rare circumstances, a facility that processes solvent-contaminated wipes for reuse may receive a container of wipes that includes free liquids, either unexpectedly as a result of effects such as compression, gravity, or percolation, or as a result of improper management by the generator before transport. In such circumstances, the processing facility is required to remove the free liquids from the solvent-contaminated wipes and the container, characterize the liquids as to whether they meet the definition of hazardous waste, and manage the liquids in accordance with the applicable requirements of COMAR 26.13.03. After removal of the free liquids, the facility may still process the wipes for reuse.

2. B. Definition. “Domestic sewage” means untreated sanitary wastes that pass through a sewer system.

3. C. Qualifiers on Exclusions of Materials from Regulation as Solid Waste.

   1. (1) The exclusion of §A(9)(c) of this regulation, concerning wood-preserving wastewaters and spent wood-preserving solutions that are to be reused, applies only as long as the plant at which the exclusion is being applied meets all of the conditions of §A(9)(c)(i)—(vii) of this regulation.

   2. (2) Reinstatement of Eligibility for Exclusion.

      1. (a) If a plant goes out of compliance with any of the conditions of §A(9)(c)(i)—(vii) of this regulation, the owner or operator of the plant may apply to the Secretary for reinstatement of eligibility for the exclusion of §A(9)(c) of this regulation.
      2. (b) The Secretary may reinstate eligibility for the exclusion of §A(9)(c) of this regulation if the Secretary finds that the plant has returned to compliance with the requirements of §A(9)(c)(i)—(vii) of this regulation and that violations are not likely to recur.

Authority: Environment Article, §6-905.3 and Title 7, Subtitle 2, Annotated Code of Maryland

Effective date:

Regulations .01—.17 adopted as an emergency provision effective November 18, 1980 (7:25 Md. R. S-1); adopted permanently effective April 3, 1981 (8:7 Md. R. 642)

Regulations .02C, F; .04A, B, D; .05D, .06B, .15, .16, and .17E, F amended, .05F adopted, and .07C repealed effective February 13, 1984 (11:3 Md. R. 202)

Regulations .02F, .03A. .06B, .13B, .14, .15, .17E—F and Appendices IV and V amended, and .05G adopted effective July 30, 1984 (11:5 Md. R. 1330)

Regulations .02F, .04D, .07C, and .16-1 adopted effective January 31, 1983 (10:2 Md. R. 110)

Regulations .03A, .04A and B, .07A and B, .10A, .11A, .12A, and .17F amended effective January 31, 1983 (10:2 Md. R. 110)

Regulations .04, .05C, .06B, .15, .16, .17E, F, and Appendix IV amended effective January 18, 1982 (9:1 Md. R. 20)

Regulation .05A, B amended effective August 12, 1985 (12:16 Md. R. 1607)

Regulation .16 amended as an emergency provision effective January 13, 1987 (14:3 Md. R. 269); emergency status expired June 29, 1987; adopted permanently effective July 12, 1987 (14:14 Md. R. 1573)

Regulation .16-1 amended as an emergency provision effective January 13, 1987 (14:3 Md. R. 269); emergency status expired June 29, 1987; adopted permanently effective July 12, 1987 (14:14 Md. R. 1573)

Annotation: COMAR 10.51.02 cited in Thomas v. State of Maryland, 62 Md. App. 160 (1985)

Regulation .01 amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .02A—F repealed, and new A—G adopted effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .03C amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .04A, B amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .05A—F amended, and G repealed effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .06 repealed and new Regulation .06 adopted effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .06-1 adopted effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .14E amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .15 amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .16 amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .16-1 amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .17 amended effective April 18, 1988 (15:8 Md. R. 1009)

Appendices III, IV, and V amended effective April 18, 1988 (15:8 Md. R. 1009)

Regulation .06-1 recodified to Regulation .07

Regulations .07—.16 recodified to Regulations .08—.17

Regulation .16-1 recodified to Regulation .18

Regulation .17A—E recodified to Regulation .19A—E

Regulation .17E-1, F, and G recodified to Regulation .19F, G, and H

Appendices I—VI codified as Regulations .20—.25

Chapter recodified from COMAR 10.51.02 to COMAR 26.13.02

Regulation .01C amended effective December 23, 1991 (18:25 Md. R. 2759); May 24, 1993 (20:10 Md. R. 853)

Regulation .02A amended effective August 28, 1995 (22:17 Md. R. 1321)

Regulation .02A, G amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .02C amended effective May 24, 1993 (20:10 Md. R. 853)

Regulation .03A amended effective December 23, 1991 (18:25 Md. R. 2759); September 7, 1998 (25:18 Md. R. 1438)

Regulation .04 amended and recodified to Regulations .04 and .04-1—.04-3 effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .04A amended effective May 24, 1993 (20:10 Md. R. 853); August 28, 1995 (22:17 Md. R. 1321); September 10, 1997 (24:5 Md. R. 413)

Regulations .04-1 amended effective April 11, 1994 (21:7 Md. R. 533); September 7, 1998 (25:18 Md. R. 1438)

Regulations .04-4 and .04-5 adopted effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .04-4B amended effective May 5, 1997 (24:9 Md. R. 659)

Regulation .05B amended effective September 10, 1997 (24:5 Md. R. 413)

Regulation .05C amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .05D amended effective May 24, 1993 (20:10 Md. R. 853); May 8, 1995 (22:9 Md. R. 648)

Regulation .05E amended effective September 7, 1998 (25:18 Md. R. 1438)

Regulation .06 amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .06A amended effective May 24, 1993 (20:10 Md. R. 853); August 28, 1995 (22:17 Md. R. 1321); September 10, 1997 (24:5 Md. R. 413); September 7, 1998 (25:18 Md. R. 1438)

Regulation .06D adopted effective August 28, 1995 (22:17 Md. R. 1321)

Regulation .09A amended effective April 11, 1994 (21:7 Md. R. 533)

Regulation .10A amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .14 repealed and new Regulation .14 adopted effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .15B and C amended effective December 23, 1991 (18:25 Md. R. 2759)

Regulation .16 amended effective December 23, 1991 (18:25 Md. R. 2759); May 24, 1993 (20:10 Md. R. 853); April 11, 1994 (21:7 Md. R. 533); September 10, 1997 (24:5 Md. R. 413)

Regulation .17 amended effective June 10, 1992 (18:25 Md. R. 2759); April 11, 1994 (21:7 Md. R. 533); August 28, 1995 (22:17 Md. R. 1321)

Regulation .18 amended effective March 6, 1989 (16:4 Md. R. 498)

Regulation .19 amended effective December 23, 1991 (18:25 Md. R. 2759); May 24, 1993 (20:10 Md. R. 853); April 11, 1994 (21:7 Md. R. 533)

Regulation .22 amended effective May 24, 1993 (20:10 Md. R. 853); April 11, 1994 (21:7 Md. R. 533); September 10, 1997 (24:5 Md. R. 413)

Regulation .23 amended effective December 23, 1991 (18:25 Md. R. 2759); April 11, 1994 (21:7 Md. R. 533); August 28, 1995 (22:17 Md. R. 1321); September 10, 1997 (24:5 Md. R. 413)

Regulation .24 amended effective April 11, 1994 (21:7 Md. R. 533); September 10, 1997 (24:5 Md. R. 413)

Regulation .25 amended effective December 23, 1991 (18:25 Md. R. 2759); April 11, 1994 (21:7 Md. R. 533); September 10, 1997 (24:5 Md. R. 413)

Regulation .26 adopted effective March 6, 1989 (16:4 Md. R. 498)

Chapter revised effective October 16, 2000 (27:20 Md. R. 1843)

Regulation .01B amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .01C amended effective November 1, 2002 (29:21 Md. R. 1647); May 1, 2008 (35:8 Md. R. 809); January 13, 2022 (49:1 Md. R. 14)

Regulation .02A, C amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .02B amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .02G amended effective November 1, 2002 (29:21 Md. R. 1647); January 13, 2022 (49:1 Md. R. 14)

Regulation .02H adopted effective January 13, 2022 (49:1 Md. R. 14)

Regulation .03 amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .03A amended effective January 18, 2016 (43:1 Md. R. 14)

Regulation .04A amended effective November 1, 2002 (29:21 Md. R. 1647); May 1, 2008 (35:8 Md. R. 809); January 18, 2016 (43:1 Md. R. 14); January 13, 2022 (49:1 Md. R. 14); October 1, 2025 (52:17 Md. R. 876)

Regulation .04C adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .04-1 amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .04-1A amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .04-3A amended effective May 1, 2008 (35:8 Md. R. 809); January 13, 2022 (49:1 Md. R. 14)

Regulation .04-3D adopted January 13, 2022 (49:1 Md. R. 14)

Regulation .04-4 amended effective May 1, 2008 (35:8 Md. R. 809); May 3, 2021 (48:9 Md. R. 359)

Regulation .04-4A amended January 13, 2022 (49:1 Md. R. 14)

Regulation .04-4F adopted January 13, 2022 (49:1 Md. R. 14)

Regulation .04-5 amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .04-5A amended effective May 3, 2021 (48:9 Md. R. 359)

Regulation .04-6 adopted effective January 18, 2016 (43:1 Md. R. 14)

Regulation .04-7 adopted effective October 1, 2025 (52:17 Md. R. 876)

Regulation .05 amended effective November 1, 2002 (29:21 Md. R. 1647); May 3, 2021 (48:9 Md. R. 359)

Regulation .05A amended effective January 1, 2007 (33:26 Md. R. 1999); January 13, 2022 (49:1 Md. R. 14)

Regulation .05A, D amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .05B amended effective September 11, 2006 (33:18 Md. R. 1507)

Regulation .05G adopted effective January 1, 2007 (33:26 Md. R. 1999)

Regulation .06 amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .06A amended effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .06A, A-1 amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .06A-1 amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .06B adopted effective October 1, 2025 (52:17 Md. R. 876)

Regulation .06C amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .06D repealed effective January 13, 2022 (49:1 Md. R. 14)

Regulation .06E adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .06E repealed effective January 13, 2022 (49:1 Md. R. 14)

Regulation .07A, B amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .07B amended effective September 11, 2006 (33:18 Md. R. 1507); May 1, 2008 (35:8 Md. R. 809)

Regulation .07-1 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .07-1B amended effective May 1, 2008 (35:8 Md. R. 809); October 1, 2025 (52:17 Md. R. 876)

Regulation .10 amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .10B amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .11 amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .11A, C amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .11-1 adopted effective May 1, 2008 (35:8 Md. R. 809)

Regulation .12B amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .13 amended effective May 1, 2008 (35:8 Md. R. 809); October 1, 2025 (52:17 Md. R. 876)

Regulation .14 amended effective May 1, 2008 (35:8 Md. R. 809)

Regulation .15D amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .16 amended effective January 18, 2016 (43:1 Md. R. 14)

Regulation .16A amended effective May 1, 2008 (35:8 Md. R. 809); October 1, 2025 (52:17 Md. R. 876)

Regulation .17 amended effective July 8, 2002 (29:13 Md. R. 992); May 1, 2008 (35:8 Md. R. 809); January 13, 2022 (49:1 Md. R. 14)

Regulation .17A amended effective January 18, 2016 (43:1 Md. R. 14)

Regulation .18 amended effective July 8, 2002 (29:13 Md. R. 992)

Regulation .19 amended effective May 1, 2008 (35:8 Md. R. 809); May 3, 2021 (48:9 Md. R. 359)

Regulation .19C, G amended effective October 1, 2025 (52:17 Md. R. 876)

Regulation .19-1 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .19-2 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .19-2 amended effective May 3, 2021 (48:9 Md. R. 359)

Regulation .19-3 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .19-4 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .19-5 adopted effective November 1, 2002 (29:21 Md. R. 1647)

Regulation .19-6 adopted effective January 18, 2016 (43:1 Md. R. 14)

Regulation .19-6A, D amended effective January 13, 2022 (49:1 Md. R. 14)

Regulation .19-7 adopted effective January 18, 2016 (43:1 Md. R. 14)

Regulation .19-7 repealed and new Regulation .19-7 adopted effective January 13, 2022 (49:1 Md. R. 14)

Regulation .19-8 adopted effective January 18, 2016 (43:1 Md. R. 14)

Regulation .19-8 repealed and new Regulation .19-8 adopted effective January 13, 2022 (49:1 Md. R. 14)

Regulation .23 amended effective November 1, 2002 (29:21 Md. R. 1647); May 1, 2008 (35:8 Md. R. 809); January 13, 2022 (49:1 Md. R. 14); October 1, 2025 (52:17 Md. R. 876)

Regulation .24 repealed and new Regulation .24 adopted effective May 1, 2008 (35:8 Md. R. 809)

Regulation .25 adopted effective January 18, 2016 (43:1 Md. R. 14)

Regulation .26 repealed and new Regulation .26 adopted effective July 8, 2002 (29:13 Md. R. 992)