The purpose of this chapter is to establish emissions limitations and procedures that apply to CO₂ budget sources and units for the use of CO₂ allowances. In this chapter, compliance with emission limitations is achieved through a process that involves the transfer of allowances from and into CO₂ budget source accounts.

Authority: Environment Article, §§1-101, 1-404, 2-103, and 2-1002(g), Annotated Code of Maryland

Effective date: July 17, 2008 (35:14 Md. R. 1247)

Chapter revised effective May 18, 2009 (36:10 Md. R. 717)

Regulation .02 amended effective January 6, 2014 (40:26 Md. R. 2165)

Regulation .03 amended effective January 21, 2013 (40:1 Md. R. 22); January 6, 2014 (40:26 Md. R. 2165); December 31, 2018 (45:26 Md. R. 1249); March 30, 2026 (53:6 Md. R. 292)

Regulation .04A amended effective December 31, 2018 (45:26 Md. R. 1249)

Regulation .05A amended as an emergency provision effective December 28, 2009 (37:4 Md. R. 336); amended permanently effective May 3, 2010 (37:9 Md. R. 674); August 6, 2012 (39:15 Md. R. 964)

Regulation .05A amended effective January 6, 2014 (40:26 Md. R. 2165)

Regulation .05C repealed effective January 6, 2014 (40:26 Md. R. 2165)

Regulation .06 amended effective March 30, 2026 (53:6 Md. R. 292)

Regulation .06B amended effective January 21, 2013 (40:1 Md. R. 22); December 31, 2018 (45:26 Md. R. 1249)

Regulation .06D amended effective December 31, 2018 (45:26 Md. R. 1249)

Regulation .06G amended effective August 6, 2012 (39:15 Md. R. 964); January 21, 2013 (40:1 Md. R. 22); December 31, 2018 (45:26 Md. R. 1249)

Regulation .07 amended effective January 21, 2013 (40:1 Md. R. 22); December 31, 2018 (45:26 Md. R. 1249)

Regulation .07H amended effective January 6, 2014 (40:26 Md. R. 2165)

Regulation .07J adopted effective March 30, 2026 (53:6 Md. R. 292

Regulation .07N amended effective August 6, 2012 (39:15 Md. R. 964)

Regulation .08 amended as an emergency provision effective February 1, 2011 (38:4 Md. R. 263); amended permanently effective May 16, 2011 (38:10 Md. R. 617)

Regulation .08A amended effective January 21, 2013 (40:1 Md. R. 22)

Regulation .08C amended effective August 6, 2012 (39:15 Md. R. 964); January 21, 2013 (40:1 Md. R. 22)

Regulation .08D adopted effective February 12, 2018 (45:3 Md. R. 157)

Regulation .09 amended effective February 12, 2018 (45:3 Md. R. 157)

Regulation .09B amended effective January 21, 2013 (40:1 Md. R. 22)

Regulation .09H amended effective August 6, 2012 (39:15 Md. R. 964); January 21, 2013 (40:1 Md. R. 22)

Regulation .10 amended effective March 30, 2026 (53:6 Md. R. 292)

Regulation .11 D, E amended effective March 30, 2026 (53:6 Md. R. 292)

Regulation .11H amended effective December 31, 2018 (45:26 Md. R. 1249)