20. The requesting State Party may require that the requested State Party keep confidential the fact and substance of the request, except to the extent necessary to execute the request. If the requested State Party cannot comply with the requirement of confidentiality, it shall promptly inform the requesting State Party.
二十、请求缔约国可以要求被请求缔约国对其提出的请求及其内容保密，但为执行请求所必需的除外。如果被请求缔约国不能遵守保密要求，应当立即通知请求缔约国。