Regarding TSR, what must the exporter obtain from the buyer?

The necessity for the exporter to obtain written assurance for re-export or release of technology from the buyer relates to compliance with export controls and regulations surrounding technology transfer. This written assurance serves as a formal commitment from the buyer that they will adhere to the terms regarding the use, re-export, or distribution of sensitive technology or data.

This requirement is particularly important in international trade involving restricted technologies, as it helps mitigate risks related to unauthorized use or diversion, ensuring that the exporter is compliant with national and international laws. Moreover, having a written record provides legal protection in case of future disputes or compliance audits.

The other options, while they may be relevant in different contexts, do not specifically address the regulatory concerns regarding technology transfer and export controls that are central to the question about TSR. Thus, the requirement for written assurance is a critical component of the due diligence process in the context of exporting sensitive technologies.