Anthropic's updated "Supported Regions Policy" will take effect on November 12, clarifying three categories of circumstances under which Claude usage is prohibited, covering individuals, enterprises, and users who access the model through overseas companies or third-party cloud platforms. First, individuals located in unsupported regions may not use Claude. Second, companies registered or headquartered in unsupported regions may not use Claude for their work, even if their employees are located in the United States. Third, for companies registered in the United States but directly or indirectly controlled by individuals or entities in unsupported regions, their employees' use of Claude is likewise restricted, and this restriction is not triggered by a shareholding threshold of 50%. This policy applies to the entire Claude product and service line, and regional restrictions cannot be circumvented even through calls via legitimate cloud platforms. The relevant restrictions have been partially implemented previously; the primary purpose this time is to further clarify the rules regarding an individual's location, a company's place of registration, and control relationships. Anthropic has previously carried out account bans and will subsequently enforce the regional and corporate attribution rules in accordance with the formal text.