Enclosure

STATE REGULATION STATUS

State: Colorado Tracking Ticket Number: 24-17

Date: April 4, 2024

[amendment(s) reviewed identified by a * at the 

beginning of the equivalent NRC requirement.] 

RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

1991-1 Safety Requirements for Radiographic Equipment

Part 34 

55 FR 843 

(Superceded by 1997-5)

01/10/1994 Final Comments 

05/29/1997

Colorado has adopted Final 

Regulations equivalent to RATS ID 

1997-5.

1991-2 ASNT Certification of Radiographers

Part 34

56 FR 11504 

(Superceded by 1997-5) none Not Required Not Required Colorado has adopted Final 

Regulations equivalent to RATS ID 

1997-5.

1991-3 Standards for Protection Against Radiation

Part 20

56 FR 23360; 56 FR 61352; 57 FR 38588; 57 FR 

57877; 58 FR 67657; 59 FR 41641; 60 FR 20183

01/01/1994 Final No Comments 

08/18/1997

1991-4 Notification of Incidents

Parts 20, 30, 31, 34, 39, 40, and 70

56 FR 64980

10/15/1994 Final Comments 

05/29/1997

1992-1 Quality Management Program and 

Misadministrations

Part 35

56 FR 34104

(Superceded by 2002-2)

01/27/1995 Not Required Not Required Colorado has adopted Final 

Regulations equivalent with RATS 

ID: 2002-2.

1992-2 Eliminating the Recordkeeping Requirements 

for Departures from Manufacturer's Instructions

Parts 30 and 35

57 FR 45566

none Not Required Not Required These regulation changes are not 

required to be adopted for purposes 

of Compatibility.
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

1993-1 Decommissioning Recordkeeping and License 

Termination: Documentation Additions [Restricted 

areas and spill sites] 

Parts 30 and 40 

58 FR 39628

10/25/1996 Final No Comments 

06/14/2000

1993-2 Licensing and Radiation Safety Requirements for 

Irradiators

Part 36

58 FR 7715

07/01/1996 Final No Comments 

05/29/1997

1993-3 Definition of Land Disposal and Waste Site QA 

Program

Part 61

58 FR 33886

07/22/1996 Final

ML043290167

No Comments 

01/05/2005

ML050050164

1994-1 Self-Guarantee as an Additional Financial 

Mechanism

Parts 30, 40, and 70 

58 FR 68726; 59 FR 1618

none Final No Comments 

06/14/2000

These regulation changes are not 

required to be adopted for purposes 

of Compatibility.

1994-2 Uranium Mill Tailings Regulations: Conforming NRC 

Requirements to EPA Standards

Part 40

59 FR 28220

07/01/1997 Final

ML043290167

No Comments 

01/05/2005

ML050050164

1994-3 Timeliness in Decommissioning Material Facilities

Parts 30, 40, and 70 

59 FR 36026

08/15/1997 Final No Comments 

06/14/2000

1995-1 Preparation, Transfer for Commercial Distribution, 

and Use of Byproduct Material for Medical Use

Parts 30, 32, and 35

59 FR 61767; 59 FR 65243; 60 FR 322

01/01/1998 Final No Comments 

06/14/2000
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

1995-2 Frequency of Medical Examinations for Use of 

Respiratory Protection Equipment

Part 20

60 FR 7900

03/13/1998 Final No Comments 

06/14/2000

1995-3 Low-Level Waste Shipment Manifest Information 

and Reporting

Parts 20 and 61

60 FR 15649; 60 FR 25983

03/01/1998 Final

ML043290167

No Comments 

01/05/2005

ML050050164

1995-4 Performance Requirements for Radiography 

Equipment

Part 34

60 FR 28323

(Superceded by 1997-5)

06/30/1998 Final No Comments 

06/14/2000

Colorado has adopted Final 

Regulations equivalent to RATS ID 

1997-5.

1995-5 Radiation Protection Requirements: Amended 

Definitions and Criteria

Parts 19 and 20

60 FR 36038

08/14/1998 Final

ML080770375

No Comments 

05/02/2008

ML081221012

1995-6 Clarification of Decommissioning Funding 

Requirements

Parts 30, 40, and 70

60 FR 38235

11/24/1998 Final

ML043290167

No Comments 

01/05/2005

ML050050164

1995-7 Medical Administration of Radiation and Radioactive 

Materials

Parts 20 and 35

60 FR 48623

(Superceded by 2002-2 and 2005-2)

10/20/1998 Final

ML043290167

No Comments 

01/05/2005

ML050050164

Colorado has adopted Final 

Regulations equivalent to RATS 

IDs: 2002-2 and 2005-2.

1996-1 Compatibility with the International Atomic Energy 

Agency

Part 71

60 FR 50248; 61 FR 28724

(Superceded by 2004-1)

04/01/1999 Final No Comments 

03/22/2001

Colorado has adopted Final 

Regulations equivalent to RATS ID 

2004-1.
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

1996-2 One Time Extension of Certain Byproduct, Source 

and Special Nuclear Materials Licenses

Parts 30, 40, and 70

61 FR 1109

02/15/1999 Not Required Not Required These regulation changes are not 

required to be adopted for purposes 

of Compatibility.

1996-3 Termination or Transfer of Licensed Activities: 

Recordkeeping Requirements

Parts 20, 30, 40, 61, and 70

61 FR 24669

06/17/1999 Final

ML043290167

No Comments 

01/05/2005

ML050050164

1997-1 Resolution of Dual Regulation of Airborne Effluents 

of Radioactive Materials; Clean Air Act

Part 20

61 FR 65120

01/9/2000 Final No Comments 

08/08/2000

1997-2 Recognition of Agreement State Licenses in Areas 

Under Exclusive Federal Jurisdiction Within an 

Agreement State

Part 150

62 FR 1662

02/27/2000 Final No Comments 

06/14/2000

1997-3 Criteria for the Release of Individuals Administered 

Radioactive Material

Parts 20 and 35

62 FR 4120

05/29/2000 Final No Comments 

06/14/2000

1997-4 Fissile Material Shipments and Exemptions

Part 71

62 FR 5907

(Superceded by 2004-1)

02/10/2000 Not Required Not Required Colorado has adopted Final 

Regulations equivalent to RATS ID 

2004-1. (See STP-97-078)

1997-5 Licenses for Industrial Radiography and Radiation 

Safety Requirements for Industrial Radiography 

Operations

Parts 30, 34, 71, and 150

62 FR 28947

06/27/2000 Final No Comments 

08/08/2000
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

1997-6 Radiological Criteria for License Termination

Parts 20, 30, 40, and 70

62 FR 39057

08/20/2000 Final No Comments 

07/13/1999

1997-7 Exempt Distribution of a Radioactive Drug 

Containing One Microcurie of Carbon-14 Urea

Part 30 

62 FR 63634

01/02/2001 Final No Comments 

06/14/2000

1998-1 Deliberate Misconduct by Unlicensed Persons

Parts 30, 40, 61, 70, 71, and 150

63 FR 1890; 63 FR 13773

02/12/2001 Final

ML010380248

No Comments 

09/17/2001

ML012630207 

1998-2 Self-Guarantee of Decommissioning Funding by 

Nonprofit and Non-Bond-Issuing Licensees

Parts 30, 40, and 70

63 FR 29535

07/01/2001 Not Required Not Required These regulation changes are not 

required to be adopted for purposes 

of Compatibility.

1998-3 License Term for Medical Use Licenses

Part 35

63 FR 31604

(Superceded by 2002-2)

07/10/2001 Not Required Not Required These regulation changes are not 

required to be adopted for purposes 

of Compatibility. (See STP-98-074)

Colorado has adopted Final 

Regulations equivalent to RATS ID: 

2002-2.

1998-4 Licenses for Industrial Radiography and Radiation 

Safety Requirements for Industrial Radiographic 

Operations

Part 34

63 FR 37059

07/09/2001 Final No Comments 

08/08/2000

1998-5 Minor Corrections, Clarifying Changes, and a Minor 

Policy Change

Parts 20, 32, 35, 36, and 39

63 FR 39477; 63 FR 45393

10/26/2001 Final

ML043290167

No Comments 

01/05/2005

ML050050164
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

1998-6 Transfer for Disposal and Manifests: Minor 

Technical Conforming Amendment

Part 20

63 FR 50127

11/20/2001 Final

ML042440167

No Comments 

01/05/2005

ML050050164

1999-1 Radiological Criteria for License Termination of 

Uranium Recovery Facilities

Part 40

64 FR 17506

06/11/2002 Final

ML020320440

No Comments 

03/28/2002

ML020880468

1999-2 Requirements for Those Who Possess Certain 

Industrial Devices Containing Byproduct Material to 

Provide Requested Information

Part 31

64 FR 42269

10/04/2002 Not Required Not Required These regulation changes are not 

required to be adopted for purposes 

of Compatibility.

1999-3 Respiratory Protection and Controls to Restrict 

Internal Exposure

Part 20

64 FR 54543; 64 FR 55524

02/02/2003 Final

ML043290167

No Comments 

01/05/2005

ML050050164

2000-1 Energy Compensation Sources for Well Logging 

and Other Regulatory Clarifications

Part 39

65 FR 20337

05/17/2003 Final

ML051580379

No Comments 

07/11/2005

ML051930014

2000-2 New Dosimetry Technology

Parts 34, 36, and 39

65 FR 63750

01/08/2004 Final

ML043290167

No Comments 

01/05/2005

ML050050164

2001-1 Requirements for Certain Generally Licensed 

Industrial Devices Containing Byproduct Material

Parts 30, 31, and 32

65 FR 79162

02/16/2004 Final

ML14258B206

No Comments

11/19/2014

ML14301A452

2002-1 Revision of the Skin Dose Limit 

Part 20

67 FR 16298

04/05/2005 Final

ML043290167

No Comments 

01/05/2005

ML050050164
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2002-2 Medical Use of Byproduct Material

Parts 20, 32, and 35

67 FR 20249

10/24/2005 Final

ML 051580379

No Comments 

07/11/2005

ML051930014

2003-1 Financial Assurance for Materials Licensees

Parts 30, 40, and 70 

68 FR 57327

12/03/2006 Final

ML043290167

No Comments 

01/05/2005

ML050050164

2004-1 Compatibility With IAEA Transportation Safety 

Standards and Other Transportation Safety 

Amendments 

Part 71

69 FR 3697

10/01/2007 R1 ML14083A534

Final

ML16147A093

Comments 

06/10/2014

ML14083A527

No Comments

07/05/2016

ML16147A077

2005-1 Security Requirements for Portable Gauges 

Containing Byproduct Material 

Part 30

70 FR 2001

07/11/2008 Final

ML052010436

No Comments 

08/05/2005

ML052220212

2005-2 Medical Use of Byproduct Material - Recognition of 

Specialty Boards 

Part 35

70 FR 16336; 71 FR 1926

04/29/2008 Final

ML051580379

No Comments 

07/11/2005

ML051930014

2005-3 Increased Controls for Risk-Significant Radioactive 

Sources (NRC Order EA-05-090)

70 FR 72128

12/01/2005 License Condition

ML052580384

No Comments 

09/19/2005

ML052630557

2006-1 Minor Amendments

Parts 20, 30, 32, 35, 40, and 70

71 FR 15005

03/27/2009 Final

ML14258B206

No Comments

11/19/2014

ML14301A452
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2006-2 National Source Tracking System - Serialization 

Requirements

Part 32 with reference to Part 20 Appendix E

71 FR 65685

02/06/2007 Final

ML13176A122

No Comments

09/16/2013

ML13176A118

Part 20 only

Colorado does not have any 

licensees subject to these 

regulations. (See SECY-95-112)

2006-3 National Source Tracking System 

Part 20

71 FR 65685, 72 FR 59162 

01/31/2009 License Condition

ML082730235

Final

ML13176A122

No Comments

10/21/2008

ML082880091

No Comments

09/16/2013

ML13176A118

2007-1 Medical Use of Byproduct Material - Minor 

Corrections and Clarifications

Parts 32 and 35

72 FR 45147, 54207

10/29/2010 Final

ML14258B206

No Comments

11/19/2014

ML14301A452

2007-2 Exemptions From Licensing, General Licenses, and 

Distribution of Byproduct Material: Licensing and 

Reporting Requirements

Parts 30, 31, 32, and 150

72 FR 58473

12/17/2010 Final

ML14258B206

No Comments

11/19/2014

ML14301A452

2007-3 Requirements for Expanded Definition of Byproduct 

Material

Parts 20, 30, 31, 32, 33, 35, 61, and 150

72 FR 55864

11/30/2010 Final

ML121150500

Final

ML14258B206

Final

ML13176A122

No Comments

06/21/2012

ML12150A112

No Comments

11/19/2014

ML14301A452

No Comments

09/16/2013

ML13176A118

Part 35 only

Parts 30, 31, 32, 33, 61,and 150

Part 20 only
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2007-4 Order Imposing Fingerprinting Requirements and 

Criminal History Records Check Requirements for 

Unescorted Access to Certain Radioactive Material

NRC Order EA-07-305

72 FR 70901

06/05/2008 License Condition

ML081070079

No Comments

05/13/2008

ML081260713

2008-1 Occupational Dose Records, Labeling Containers, 

and Total Effective Dose Equivalent

Parts 19 and 20

72 FR 68043

02/15/2011 Final

ML13162A626

Final

ML13176A122

No Comments

08/15/2013

ML13162A614

No Comments

09/16/2013

ML13176A118

Definitions associated with RATS ID 

2008-1 only

Part 20 only

2009-1 Medical Use of Byproduct Material – Authorized 

User Clarification

Part 35

74 FR 33901

09/28/2012 Final

ML121150500

Revised Final

ML20009E749

Comments

06/21/2012

ML12150A112

No Comments

02/20/2020

ML20009E714

2011-1 Decommissioning Planning

Parts 20, 30, 40, and 70

76 FR 35512

12/17/2015 Final

ML13176A122

Final

ML14258B206

Revised Final

ML15225A210

No Comments

09/16/2013

ML13176A118

Comments

11/19/2014

ML14301A452

No Comments

09/29/2015

ML15225A190

Part 20 only

Parts 30, 40, and 70
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2011-2 Licenses, Certifications, and Approvals for Materials 

Licensees 

Parts 30, 36, 39, 40, 70, and 150

76 FR 56951

11/14/2014 Proposed

ML15225A210

Proposed

ML16043A255

Final

ML16175A368

Final

ML16271A427

Final

ML16278A122

Comments

09/29/2015

ML15225A190

Comment

03/18/2016

ML16043A249

No Comments

08/03/2016

ML16175A362

No Comments

10/31/2016

ML16271A417

No Comments

11/10/2016

ML16278A105

Comment on 6 CCR 1007-1,16.3 / 

10 CFR 39.13

Parts 30, 40, 70, and 150 only

Part 39 only, resolves comment on 

6 CCR 1007-1, 16.3 / 10 CFR 39.13 

above

Part 36 only

Final regulations have addressed all 

comments for all Parts

2012-1 Change of Compatibility of 

Parts 31.5 and 31.6

(See RATS ID: 2001-1 for Rule text)

77 FR 3640

01/25/2015 Final

ML14258B206

No Comments

11/19/2014

ML14301A452

2012-2 Advance Notification to Native American Tribes of 

Transportation of Certain Types of Nuclear Waste

Part 71

77 FR 34194

08/10/2015 Proposed

ML14083A534

Final

ML16147A093

Comments

06/10/2014

ML14083A527

No Comments

07/05/2016

ML16147A077
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2012-3 Technical Corrections

Parts 30, 34, 40, and 71

77 FR 39899

08/06/2015 Proposed

ML14083A534

Final

ML16147A093

No Comments

06/10/2014

ML14083A527

No Comments

07/05/2016

ML16147A077

Part 71 only

2012-4 Requirements for Distribution of Byproduct Material

Parts 30, 31, 32, 40, and 70

77 FR 43666

10/23/2015 Proposed

ML15225A210

Final

ML16175A368

No Comments

09/29/2015

ML15225A190

No Comments

08/03/2016

ML16175A362
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2013-1 Physical Protection of Byproduct Material

Parts 20, 30, 32, 33, 34, 35, 36, 37, 39, and 71 

78 FR 16922

03/19/2016 Proposed

ML14083A534

Proposed

ML15077A245

Final

ML15252A221

Final

ML16147A093

Final

ML16175A368

Revised Final

ML16343B063

Revised Final

ML17207A208

No Comments

06/10/2014

ML14083A527

Comments

04/13/2015

ML15077A234

Comments

11/03/2015

ML15252A219

No Comments

07/05/2016

ML16147A077

Comment

08/03/2016

ML16175A362

No Comments

12/27/2016

ML16343B061

No Comments

08/07/2017

ML17207A203

Part 71 only

All Parts; Comments were re: 

30.13, 37.23(g), 37.73(c), and 

71.97

Part 37 only; Comments were re: 

37.43(c)(3), 37.77(a)(1) and 71.97

Part 71 only

Part 30 only; Comment was re: 

30.13

CO submitted equivalent regs to 

30.13 and 37.43 only

CO submitted regulations to 30.13, 

37.43(c)(3) and 37.77(a)(1)

Final regulations have addressed all 

comments for all Parts

2013-2 Distribution of Source Material to Exempt Persons 

and to General Licensees and Revision of

General License and Exemptions, 

Parts 30, 40, and 702

78 FR 32310

08/27/2016 Proposed

ML15225A210

Final

ML16175A368

Comment

09/29/2015

ML15225A190

No Comments

08/03/2016

ML16175A362
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2015-1 Domestic Licensing of Special Nuclear Material – 

Written Reports and Clarifying Amendments

Part 702

79 FR 57721, 80 FR 143

01/26/2018 Final

ML15134A311

No Comments

06/18/2015

ML15134A303

2015-2 Safeguards Information - Modified Handling 

Categorization, Change for Materials Facilities

Parts 30, 37, 702, and 150

79 FR 58664, 80 FR 3865

01/28/2018 Proposed

ML15077A245

Final

ML15252A221

No Comments

04/13/2015

ML15077A234

No Comments

11/03/2015

ML15252A219

2015-3 Revisions to Transportation Safety Requirements 

and Harmonization with International Atomic Energy 

Agency Transportation Requirements

Part 71

80 FR 33987

07/13/2018

extended to 

08/15/2020

See STC 17-060

Proposed

ML17052A094

Final

ML18025B179

Revised Final

ML20097D395

Revised Final

ML20322A190

Comments

04/06/2017

ML17052A080

Comment

03/08/2018

ML18025A867

Comments

04/24/2020

ML20097D175

No Comments

12/17/2020

ML20342A183

2015-4 Miscellaneous Corrections, 

Parts 37 and 40

80 FR 45841

09/02/2018 Final

ML15252A221

No Comments

11/03/2015

ML15252A219
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2015-5 Miscellaneous Corrections, 

Parts 19, 20, 30, 32, 37, 40, 61, 702, 71, and 150

80 FR 74974

12/31/2018 Proposed

ML16343B063

Proposed

ML17052A094

Final

ML17207A208

Final

ML18025B179

Revised Final

ML20097D395

Comment

12/27/2016

ML16343B061

No Comments

04/06/2017

ML17052A080

No Comments

08/07/2017

ML17207A203

Comment

03/08/2018

ML18025A867

No Comments

04/24/2020

ML20097D175

CO submitted equivalent 

regulations to 37.27(c)(1) only

CO submitted equivalent 

regulations to Part 71 only

CO submitted equivalent 

regulations to 37.27(c)(1) only

CO submitted all equivalent 

regulations; comment re: 

37.77(a)(1).

2018-1 Medical Use of Byproduct Material – Medical Event 

Definitions, Training and Experience, and Clarifying 

Amendments

Parts 30, 32 and 35

01/14/2022 Proposed

ML20007E74

Final

ML20281A368

Comments

02/20/2020

ML20007E714

No Comments

10/28/2020

ML20281A277

2018-2 Miscellaneous Corrections – Organizational 

Changes

Parts 37, 40. 702 and 71

12/21/2021 Proposed

ML20097D395

Final 

ML20322A190

Comments

04/24/2020

ML20097D175

No Comments

12/17/2020

ML20342A183
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2018-3 Miscellaneous Corrections

Parts 1, 2, 34, 37, 50, 71, 73, and 140

7/30/2022 Proposed

ML20097D395

Final

ML20322A190

No Comments

04/24/2020

ML20097D175

No Comments

12/17/2020

ML20342A183

2019-1 Miscellaneous Corrections

Parts 2, 21, 37, 50, 52, 73, and 100

12/18/2022 Proposed

ML20097D395

Final

ML20322A190

No Comments

04/24/2020

ML20097D175

No Comments

12/17/2020

ML20342A183

2019-2 Organizational Changes and Conforming 

Amendments

Parts 1, 2, 37, 40, 50, 51, 52, 55, 71, 72, 73, 74, 

100, 140, and 150

12/30/2022 Proposed

ML20097D395

Final

ML20332A190

No Comments

04/24/2020

ML20097D175

No Comments

12/17/2020

ML20342A183

2020-1 Individual Monitoring Devices

Parts 34, 36, and 39

06/16/2023 Proposed

ML20352A327

Proposed

ML21352A327

Final

ML21238A230

No Comments

01/05/2021

ML20352A309

Comment

04/16/2021

ML21352A309

No Comments

09/23/2021

ML21238A218

CO submitted equivalent 

regulations; to Parts 36 and 39 

only.

CO submitted equivalent 

regulations to Part 34.
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2020-2 Social Security Number Fraud Prevention

Parts 9 and 35

08/17/2023 Final

ML20281A368

No Comments

10/28/2020

ML20281A277

2020-3 Miscellaneous Corrections 

10 CFR Parts 1, 2, 19, 20, 21, 30, 34, 35, 40, 50, 

51, 52, 60, 61, 62, 63, 702, 71, 72, 73, 74, 75, 76, 

110, and 140

11/16/2023 Proposed

ML22157A362

Final

ML23025A302

No Comments

07/05/2022

ML22157A343

No Comments

02/01/2023

ML23025A273

2021-1 Miscellaneous Corrections 

10 CFR Parts 2, 11, 20, 25, 32, 35, 37, 50, 52,55, 

70, 72, 73, 95, and 110

09/08/2024 Proposed

ML22157A362

Final

ML23025A302

No Comments

07/05/2022

ML22157A343

No Comments

02/01/2023

ML23025A273

2021-2 Miscellaneous Corrections 

10 CFR Parts 9, 37, 40, 50, 51, 52, 55, 71, 73, and 

110

12/30/2024 Proposed

ML22157A362

Final

ML23025A302

No Comments

07/05/2022

ML22157A343

No Comments

02/01/2023

ML23025A273

2022-1 Miscellaneous Corrections

10 CFR 1, 2, 20, 30, 40, 50, 55, 702, 73, and 170

none Provisions are not required for 

compatibility.

2022-2 Miscellaneous Corrections

10 CFR Parts 20, 35, 50, 51, 52, 72, 73, 110, and 

150

none Provisions are not required for 

compatibility.
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

2023-1 Miscellaneous Corrections

10 CFR PARTS 1, 2, 26, 32, 40, 50, 51, 52, 72, and 

73

09/25/2026 Final

ML24003A685

No Comments

02/20/2024

ML23362A135

N/A Part 20.1003 N/A Final

ML13162A626

No Comments

08/15/2013

ML13162A614

N/A Part 40 N/A R1 ML13316A107

Final

ML16175A368

Comments

01/14/2014

ML13316A058

No Comments

08/03/2016

ML16175A362

N/A

N/A Legislation N/A Final

ML111080623

Revised Final

ML15033A229

Revised Final

ML15225A210

Revised Final

ML16162A172

Comments

10/24/2011

ML112630034

Comments

02/18/2015

ML15033A220

Comments

09/29/2015

ML15225A190

No Comments

07/15/2016

ML16162A165

N/A Parts 20.1403(a), 20.1901 and 20.2104 N/A Final

ML13176A122

No Comments

09/16/2013

ML13176A118
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

N/A Revision to Radiation Control Act N/A Final

ML14107A082

Revised Final

ML16162A172

Comments

05/29/2014

ML14084A381

No Comments

07/15/2016

ML16162A165

N/A Part 40, Appendix A, Criterion 10 N/A Final

ML14258B206

Revised Final

ML15225A210

Final

ML16175A368

Comments

11/19/2014

ML14301A452

No Comments

09/29/2015

ML15225A190

No Comments

08/03/2016

ML16175A362

N/A Part 40, Appendix A, Criterion 6 N/A Revised Final

ML15225A210

Final

ML16175A368

Comments

09/29/2015

ML15225A190

No Comments

08/03/2016

ML16175A362
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

N/A Part 20, Appendices B and C, decay-in-storage and 

40.61

N/A Final

ML15261A410

Revised Final

ML16343B063

Revised Final

ML17207A208

Comments

11/18/2015

ML15261A381

No Comments

12/27/2016

ML16343B061

No Comments

08/07/2017

ML17207A203

CO submitted 10 CFR 20, Appendix 

C only

CO submitted 10 CFR Appendices 

B&C

N/A Part 39 N/A Proposed

ML16043A255

Final

ML16271A427

Comments

03/18/2016

ML16043A249

No Comments

10/31/2016

ML16271A417

N/A 10 CFR 30.15(a)(1)(viii) and 31.12 N/A Proposed

ML23108A041

Final

ML24003A685

No Comments

04/24/2023

ML23108A031

No Comments

02/20/2024

ML23362A135

N/A 10 CFR 20.1502(a) N/A Proposed

ML23135A154

Final

ML24003A685

No Comments

06/12/2023

ML23135A129

No Comments

02/20/2024

ML23362A135
RATS ID NRC Chronology Identification Date Due for 

State Adoption

Incoming 

Letter

Outgoing 

Package

Notes

*N/A 10 CFR part 19 N/A Proposed

ML24071A043

No Comments

04/04/2024

ML24071A041

Improve the consistency in the 

language between Colorado 

rule and 10 CFR Part

19 and are not associated with 

any NRC RATS identification 

number or NRC comments. 1

 R stands for revisions to final rule

2

 IMPEP team confirm that CO does not authorize these materials on any licenses, e.g., depleted uranium for shielding.