U.S. EPA has finalized a rule governing the sequestration of carbon dioxide, according to this press release. More specifically: "EPA finalized a rule that sets requirements for geologic sequestration of carbon dioxide, including the development of a new class of injection well called Class VI, established under EPA’s Underground Injection Control (UIC) Program. The rule requirements are designed to ensure that wells used for geologic sequestration of carbon dioxide are appropriately sited, constructed, tested, monitored, and closed. The UIC Program was established under the authority of the Safe Drinking Water Act."
For more, including a pre-publication copy of the rule, see here.
(Update: For a copy of the Federal Register version, see here.)