| 1990 | J. Kaleta to S. Denny (DOE/EM) | Applicability of the HMTA to GOCO and GOGO Transportation | 
        
            | 1991 | J. Kaleta to S. Denny (DOE/EM) | Definition of "Public Highway" and Jurisdiction of HMTUSA over Roads on DOE Sites | 
        
            | 1992 | J. Kaleta to M. Malsch (NRC) | Applicability of the HMR and NRC Regulations to DOE Contractors | 
        
            | 1993 | E. Bonekemper to J. Williams (DOE-GC) | Applicability of the HMTA to LANL | 
        
            | 1996 | J. S. Hedgepeth to  T. Needels (DOE/EM) | DOT Special Permit Party-to-Status for DOE Contractors | 
        
            | 1997 | E. Mazzullo to D. Stancell (DOE-OR) | Applicability of the HMR to GOGO Operations | 
        
            | 1997 | E. Bonekemper to R. Bell (OR Contractor) | Applicability of the HMTA to Roads on DOE Sites | 
        
            | 2003 | E. Mazzullo to S. Wisness (DOE-RL) | Applicability of the HMR to Security Personnel at Richland | 
        
            | 2003 | H. Mitchell to J. Johnston (LANL) | Clarification on who may apply the packaging marking identified in § 178.350 for DOT Specification 7A Packaging | 
        
            | 2005 | H. Mitchell to D. Ashworth (DOE/EM) | Clarification of specification packaging marking requirements under the HMR | 
        
            | 2006 | J. Gale to J. Lowery (ALO Contractor) | Applicability of the HMR to LANL | 
        
            | 2006 | J. Gale to R. Porter | Clarification of shipping a Type A quantity of non-fissile radioactive material in a Type B package | 
        
            | 2007 | S. Gorsky to D. Ashworth (DOE/EM) | Applicability of the HMR to DOE Security Personnel to transport loaded firearms on public highways in the  performance of their duties, and to transport weapons and bulk explosives on public highways to a training location. 
 | 
        
            | 2008 | H. Mitchell to E. McNeil (DOE/EM) | Clarification of Training Requirements Pertaining to Special Permits (HMR 49 CFR Parts 171-180) | 
        
            | 2008 | E. Mazzullo to E. McNeil (DOE/EM) | Clarification of the Use of Freight Containers Designed, Tested and Fabricated to ISO 1496-1 | 
        
            | 2008 | C. Betts to J. Shuler (DOE/EM) | Clarification of Competent Authority Approvals USA/0696/S-96 and USA/0695/S-96 | 
        
            | 2009 | C. Betts to J. Portsmouth (RL Contractor) | Clarification of Marking Requirements for Industrial Packagings and DOT Specification 7A Packagings | 
        
            | 2014 | J. Solomey to G. French | Interpretation Regarding Our Road Closure Process for Taking Shipments Out of Commerce at Hanford | 
        
            | 2014 | T. Foster to M. Hawk | Interpretation Regarding Drop Tests for Fissile Materials in DOT 7A Type A Packaging | 
        
            | 2015 | T. Foster to M. Hawk | Interpretation Concerning Use of a Package Mass Less Than the Qualified Mass of
            the Package | 
        
            | 2015 | D. Pfund to D. Claussen | Interpretation of Exclusive Use Consignments | 
        
            | 2017 | T. Foster to M. Hawk | Interpretation Concerning Proper Shipping Name based of Packaging Type or Material being shipped | 
        
            | 2018 | D. Kinderen to J. Schlueter | Interpretation Clarification of The Hazardous Materials Regulations Applicable to Non-radioactive Solid Objects with Surface Radioactive Contamination |