This subpart establishes requirements under section 6 of TSCA applicable to the transboundary shipments of PCBs and PCB Items into and out of the United States for disposal. Nothing in this subpart is intended to obviate or otherwise alter obligations applicable to imported or exported PCBs and PCB Items under foreign laws, international agreements or arrangements, other United States statutes and regulations, other sections of TSCA (e.g., sections 13 and 14), or laws of the various States of the United States. No provision of this section shall be construed to affect or limit the applicability of any requirement applicable to transporters of PCB waste under regulations issued by the U.S. Department of Transportation (DOT) and set forth at 49 CFR parts 171-180.