(b)(2) and (c)(2). (e) Regulatory authority (1) In general The Secretary shall consult with the Administrator of the Environmental Protection Agency and the Secretary of Energy in establishing rules and regulations implementing the purposes of this section. (2) Treaties The Secretary, in consultation with the Secretary of State, may adjust the applicable amounts of the refunds and equivalency fees under this section in a manner that is consistent with any obligations of the United States under an international agreement. 4696. Definitions and other rules (a) Definitions For purposes of this subchapter: (1) Carbon dioxide equivalent The term carbon dioxide equivalent means, with respect to a greenhouse gas, the quantity of such gas that has a global warming potential equivalent to 1 metric ton of carbon dioxide, as determined pursuant to table A–1 of subpart A of part 98 of title 40, Code of Federal Regulations, as in effect on the date of the enactment of the American Opportunity Carbon Fee Act of 2018 . (2) Greenhouse gas The term greenhouse gas has the meaning given such term under section 211(o)(1)(G) of the Clean Air Act, as in effect on the date of the enactment of the American Opportunity Carbon Fee Act of 2018 . (3) Coal The term coal has the same meaning given such term under section 48A(c)(4). (4) Petroleum product The term petroleum product has the same meaning given such product under section 4612(a)(3). (5) Associated emissions The term associated emissions means greenhouse gas emissions attributable to venting, flaring, and leakage across the supply chain. (6) Supply chain The term supply chain means extraction and processing of coal and natural gas, extraction and refining of petroleum products, and the transmission, transport, storage, distribution, import, export, and other activities related to supplying coal, petroleum products, and natural gas to a consumer, not otherwise covered elsewhere in this subchapter as determined by the Administrator of the Environmental Protection Agency. (7)