Thailand’s Department of Mineral Fuels (DMF) has developed a framework to regulate carbon capture and storage (CCS) and related activities by introducing “carbon business” to the draft amendment to the Petroleum Act B.E. 2514 (1971). CCS involves the capture, treatment, transport, and underground storage of carbon dioxide produced from industrial power generation. The captured carbon can be used to enhance oil recovery, converted into fuel such as methane or DME (dimethyl ether), or converted to higher-value products. In Thailand, various companies have carried out CCS feasibility studies. Carbon Business and Licensing Under the draft amendment to the Petroleum Act, “carbon business” is defined as exploration for purposes of carbon storage or compression of carbon into carbon storage, while “carbon” is defined as carbon dioxide in the state of gas or supercritical fluid generated as a byproduct or captured from other sources and transported for storage. Any concessionaire, product-sharing contractor, or service contract holder that has been granted permission to explore for or produce petroleum under the Petroleum Act can apply for a carbon business license from the director-general of the DMF with the approval of the Petroleum Committee. Licenses are also available to any other parties who meet the eligibility criteria to be prescribed later by a ministerial regulation. Licenses for these parties will be allocated through competitive bidding according to procedures to be announced by the minister of the Ministry of Energy (MOE). In granting a license, the minister of the MOE and the director-general of the DMF will consider the geological suitability of carbon storage, storage systems, surrounding areas of carbon storage, risk of carbon leakage and movement, environmental impacts, and the applicant’s financial potential and ability in environmental management. Responsibilities of Carbon Business Operators Carbon business operators are required to monitor and inspect their installations, structures,